90789354997 has 8 divisors (see below), whose sum is σ = 99822799872. Its totient is φ = 81885888000.

The previous prime is 90789354989. The next prime is 90789355009. The reversal of 90789354997 is 79945398709.

It is a happy number.

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 90789354997 - 2³ = 90789354989 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 (90789304997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32493004 + ... + 32495797.

It is an arithmetic number, because the mean of its divisors is an integer number (12477849984).

Almost surely, 2^90789354997 is an apocalyptic number.

It is an amenable number.

90789354997 is a deficient number, since it is larger than the sum of its proper divisors (9033444875).

90789354997 is a wasteful number, since it uses less digits than its factorization.

90789354997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64988939.

The product of its (nonzero) digits is 154314720, while the sum is 70.

The spelling of 90789354997 in words is "ninety billion, seven hundred eighty-nine million, three hundred fifty-four thousand, nine hundred ninety-seven".