90187539 has 16 divisors (see below), whose sum is σ = 130233600. Its totient is φ = 55185696.

The previous prime is 90187529. The next prime is 90187553. The reversal of 90187539 is 93578109.

It is a happy number.

It is not a de Polignac number, because 90187539 - 2⁴ = 90187523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90187539.

It is not an unprimeable number, because it can be changed into a prime (90187529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522 + ... + 13440.

It is an arithmetic number, because the mean of its divisors is an integer number (8139600).

Almost surely, 2^90187539 is an apocalyptic number.

90187539 is a deficient number, since it is larger than the sum of its proper divisors (40046061).

90187539 is a wasteful number, since it uses less digits than its factorization.

90187539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13114.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 90187539 is about 9496.7120099538. The cubic root of 90187539 is about 448.4515320930.

The spelling of 90187539 in words is "ninety million, one hundred eighty-seven thousand, five hundred thirty-nine".