90931798 has 4 divisors (see below), whose sum is σ = 136397700. Its totient is φ = 45465898.

The previous prime is 90931783. The next prime is 90931801. The reversal of 90931798 is 89713909.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22732948 + ... + 22732951.

It is an arithmetic number, because the mean of its divisors is an integer number (34099425).

Almost surely, 2^90931798 is an apocalyptic number.

90931798 is a deficient number, since it is larger than the sum of its proper divisors (45465902).

90931798 is a wasteful number, since it uses less digits than its factorization.

90931798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45465901.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 90931798 is about 9535.8165880013. The cubic root of 90931798 is about 449.6817469918.

The spelling of 90931798 in words is "ninety million, nine hundred thirty-one thousand, seven hundred ninety-eight".