90688973929 has 8 divisors (see below), whose sum is σ = 95495019840. Its totient is φ = 85886222256.

The previous prime is 90688973909. The next prime is 90688973983. The reversal of 90688973929 is 92937988609.

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

It is a cyclic number.

It is not a de Polignac number, because 90688973929 - 2⁵ = 90688973897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90688973909) 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, 766942 + ... + 877255.

It is an arithmetic number, because the mean of its divisors is an integer number (11936877480).

Almost surely, 2^90688973929 is an apocalyptic number.

It is an amenable number.

90688973929 is a deficient number, since it is larger than the sum of its proper divisors (4806045911).

90688973929 is a wasteful number, since it uses less digits than its factorization.

90688973929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647119.

The product of its (nonzero) digits is 105815808, while the sum is 70.

The spelling of 90688973929 in words is "ninety billion, six hundred eighty-eight million, nine hundred seventy-three thousand, nine hundred twenty-nine".