90139575 has 24 divisors (see below), whose sum is σ = 149522176. Its totient is φ = 47916000.

The previous prime is 90139547. The next prime is 90139603. The reversal of 90139575 is 57593109.

It is an interprime number because it is at equal distance from previous prime (90139547) and next prime (90139603).

It is not a de Polignac number, because 90139575 - 2⁷ = 90139447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23010 + ... + 26640.

Almost surely, 2^90139575 is an apocalyptic number.

90139575 is a deficient number, since it is larger than the sum of its proper divisors (59382601).

90139575 is a wasteful number, since it uses less digits than its factorization.

90139575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 90139575 is about 9494.1863790427. The cubic root of 90139575 is about 448.3720187302.

The spelling of 90139575 in words is "ninety million, one hundred thirty-nine thousand, five hundred seventy-five".