90394991883 has 48 divisors (see below), whose sum is σ = 150797439936. Its totient is φ = 51111889920.

The previous prime is 90394991879. The next prime is 90394991887. The reversal of 90394991883 is 38819949309.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90394991879) and next prime (90394991887).

It is not a de Polignac number, because 90394991883 - 2² = 90394991879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 90394991883.

It is not an unprimeable number, because it can be changed into a prime (90394991887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2684773 + ... + 2718233.

It is an arithmetic number, because the mean of its divisors is an integer number (3141613332).

Almost surely, 2^90394991883 is an apocalyptic number.

90394991883 is a deficient number, since it is larger than the sum of its proper divisors (60402448053).

90394991883 is a wasteful number, since it uses less digits than its factorization.

90394991883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33924 (or 33921 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 90394991883 in words is "ninety billion, three hundred ninety-four million, nine hundred ninety-one thousand, eight hundred eighty-three".