1080173957 has 4 divisors (see below), whose sum is σ = 1080271980. Its totient is φ = 1080075936.

The previous prime is 1080173953. The next prime is 1080173971. The reversal of 1080173957 is 7593710801.

It is a Cunningham number, because it is equal to 32866²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7593710801 = 953 ⋅7968217.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 1075905601 = 2066^2 + 32801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1080173957 - 2² = 1080173953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080173953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30032 + ... + 55337.

It is an arithmetic number, because the mean of its divisors is an integer number (270067995).

Almost surely, 2^1080173957 is an apocalyptic number.

It is an amenable number.

1080173957 is a deficient number, since it is larger than the sum of its proper divisors (98023).

1080173957 is an equidigital number, since it uses as much as digits as its factorization.

1080173957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98022.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 1080173957 is about 32866.0000152133. Note that the first 4 decimals coincide. The cubic root of 1080173957 is about 1026.0406506572.

The spelling of 1080173957 in words is "one billion, eighty million, one hundred seventy-three thousand, nine hundred fifty-seven".