90973899 has 12 divisors (see below), whose sum is σ = 135938400. Its totient is φ = 58557744.

The previous prime is 90973879. The next prime is 90973903. The reversal of 90973899 is 99837909.

It is a happy number.

It is not a de Polignac number, because 90973899 - 2⁸ = 90973643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90973829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174019 + ... + 174540.

It is an arithmetic number, because the mean of its divisors is an integer number (11328200).

Almost surely, 2^90973899 is an apocalyptic number.

90973899 is a deficient number, since it is larger than the sum of its proper divisors (44964501).

90973899 is a wasteful number, since it uses less digits than its factorization.

90973899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348594 (or 348591 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 90973899 is about 9538.0238519308. The cubic root of 90973899 is about 449.7511364704.

It can be divided in two parts, 9097 and 3899, that added together give a square (12996 = 114²).

The spelling of 90973899 in words is "ninety million, nine hundred seventy-three thousand, eight hundred ninety-nine".