90193755 has 32 divisors (see below), whose sum is σ = 153313344. Its totient is φ = 45121536.

The previous prime is 90193739. The next prime is 90193759. The reversal of 90193755 is 55739109.

It is not a de Polignac number, because 90193755 - 2⁴ = 90193739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90193759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146829 + ... + 147441.

It is an arithmetic number, because the mean of its divisors is an integer number (4791042).

Almost surely, 2^90193755 is an apocalyptic number.

90193755 is a deficient number, since it is larger than the sum of its proper divisors (63119589).

90193755 is a wasteful number, since it uses less digits than its factorization.

90193755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215.

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

The square root of 90193755 is about 9497.0392754795. The cubic root of 90193755 is about 448.4618347383.

The spelling of 90193755 in words is "ninety million, one hundred ninety-three thousand, seven hundred fifty-five".