90993387 has 16 divisors (see below), whose sum is σ = 127284480. Its totient is φ = 57741600.

The previous prime is 90993377. The next prime is 90993439. The reversal of 90993387 is 78339909.

It is not a de Polignac number, because 90993387 - 2¹¹ = 90991339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90993307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189 + ... + 13542.

It is an arithmetic number, because the mean of its divisors is an integer number (7955280).

Almost surely, 2^90993387 is an apocalyptic number.

90993387 is a deficient number, since it is larger than the sum of its proper divisors (36291093).

90993387 is a wasteful number, since it uses less digits than its factorization.

90993387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14834.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 90993387 is about 9539.0453924908. The cubic root of 90993387 is about 449.7832487007.

The spelling of 90993387 in words is "ninety million, nine hundred ninety-three thousand, three hundred eighty-seven".