81088607 has 4 divisors (see below), whose sum is σ = 81707736. Its totient is φ = 80469480.

The previous prime is 81088573. The next prime is 81088613. The reversal of 81088607 is 70688018.

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

It is a cyclic number.

It is not a de Polignac number, because 81088607 - 2²⁰ = 80040031 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 (81088307) 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, 309368 + ... + 309629.

It is an arithmetic number, because the mean of its divisors is an integer number (20426934).

Almost surely, 2^81088607 is an apocalyptic number.

81088607 is a deficient number, since it is larger than the sum of its proper divisors (619129).

81088607 is a wasteful number, since it uses less digits than its factorization.

81088607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619128.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 81088607 is about 9004.9212656192. The cubic root of 81088607 is about 432.8325832375.

The spelling of 81088607 in words is "eighty-one million, eighty-eight thousand, six hundred seven".