81079535 has 8 divisors (see below), whose sum is σ = 97356336. Its totient is φ = 64823040.

The previous prime is 81079513. The next prime is 81079549. The reversal of 81079535 is 53597018.

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

It is not a de Polignac number, because 81079535 - 2⁸ = 81079279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5855 + ... + 14015.

It is an arithmetic number, because the mean of its divisors is an integer number (12169542).

Almost surely, 2^81079535 is an apocalyptic number.

81079535 is a deficient number, since it is larger than the sum of its proper divisors (16276801).

81079535 is a wasteful number, since it uses less digits than its factorization.

81079535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10153.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 81079535 is about 9004.4175269697. The cubic root of 81079535 is about 432.8164412097.

The spelling of 81079535 in words is "eighty-one million, seventy-nine thousand, five hundred thirty-five".