1081918407 has 8 divisors (see below), whose sum is σ = 1442932720. Its totient is φ = 721091520.

The previous prime is 1081918393. The next prime is 1081918417. The reversal of 1081918407 is 7048191801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1081918407 - 2⁴ = 1081918391 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 (1081918417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32782 + ... + 56907.

It is an arithmetic number, because the mean of its divisors is an integer number (180366590).

Almost surely, 2^1081918407 is an apocalyptic number.

1081918407 is a deficient number, since it is larger than the sum of its proper divisors (361014313).

1081918407 is an equidigital number, since it uses as much as digits as its factorization.

1081918407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93713.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1081918407 is about 32892.5281333010. The cubic root of 1081918407 is about 1026.5926956717.

The spelling of 1081918407 in words is "one billion, eighty-one million, nine hundred eighteen thousand, four hundred seven".