90915982 has 4 divisors (see below), whose sum is σ = 136373976. Its totient is φ = 45457990.

The previous prime is 90915973. The next prime is 90916003. The reversal of 90915982 is 28951909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28951909 = 7 ⋅4135987.

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, 22728994 + ... + 22728997.

It is an arithmetic number, because the mean of its divisors is an integer number (34093494).

Almost surely, 2^90915982 is an apocalyptic number.

90915982 is a deficient number, since it is larger than the sum of its proper divisors (45457994).

90915982 is a wasteful number, since it uses less digits than its factorization.

90915982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45457993.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 90915982 is about 9534.9872574640. The cubic root of 90915982 is about 449.6556740483.

The spelling of 90915982 in words is "ninety million, nine hundred fifteen thousand, nine hundred eighty-two".