90688973930 has 8 divisors (see below), whose sum is σ = 163240153092. Its totient is φ = 36275589568.

The previous prime is 90688973909. The next prime is 90688973983. The reversal of 90688973930 is 3937988609.

It can be written as a sum of positive squares in 2 ways, for example, as 89094489169 + 1594484761 = 298487^2 + 39931^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4534448687 + ... + 4534448706.

Almost surely, 2^90688973930 is an apocalyptic number.

90688973930 is a deficient number, since it is larger than the sum of its proper divisors (72551179162).

90688973930 is a wasteful number, since it uses less digits than its factorization.

90688973930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9068897400.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 90688973930 in words is "ninety billion, six hundred eighty-eight million, nine hundred seventy-three thousand, nine hundred thirty".