109478657 has 4 divisors (see below), whose sum is σ = 115918596. Its totient is φ = 103038720.

The previous prime is 109478641. The next prime is 109478711. The reversal of 109478657 is 756874901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61716736 + 47761921 = 7856^2 + 6911^2 .

It is a cyclic number.

It is not a de Polignac number, because 109478657 - 2⁴ = 109478641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109478617) 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, 3219944 + ... + 3219977.

It is an arithmetic number, because the mean of its divisors is an integer number (28979649).

Almost surely, 2^109478657 is an apocalyptic number.

109478657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109478657 is a deficient number, since it is larger than the sum of its proper divisors (6439939).

109478657 is an equidigital number, since it uses as much as digits as its factorization.

109478657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6439938.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 109478657 is about 10463.2049105425. The cubic root of 109478657 is about 478.3838251024.

The spelling of 109478657 in words is "one hundred nine million, four hundred seventy-eight thousand, six hundred fifty-seven".