90789649923 has 16 divisors (see below), whose sum is σ = 138420056576. Its totient is φ = 51852078720.

The previous prime is 90789649921. The next prime is 90789649927. The reversal of 90789649923 is 32994698709.

It is not a de Polignac number, because 90789649923 - 2¹ = 90789649921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90789649921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114783 + ... + 1193448.

It is an arithmetic number, because the mean of its divisors is an integer number (8651253536).

Almost surely, 2^90789649923 is an apocalyptic number.

90789649923 is a deficient number, since it is larger than the sum of its proper divisors (47630406653).

90789649923 is a wasteful number, since it uses less digits than its factorization.

90789649923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310114.

The product of its (nonzero) digits is 52907904, while the sum is 66.

The spelling of 90789649923 in words is "ninety billion, seven hundred eighty-nine million, six hundred forty-nine thousand, nine hundred twenty-three".