90109755 has 24 divisors (see below), whose sum is σ = 157631760. Its totient is φ = 47615040.

The previous prime is 90109739. The next prime is 90109819. The reversal of 90109755 is 55790109.

It is a happy number.

It is not a de Polignac number, because 90109755 - 2⁴ = 90109739 is a prime.

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, 4281 + ... + 14090.

It is an arithmetic number, because the mean of its divisors is an integer number (6567990).

Almost surely, 2^90109755 is an apocalyptic number.

90109755 is a deficient number, since it is larger than the sum of its proper divisors (67522005).

90109755 is a wasteful number, since it uses less digits than its factorization.

90109755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18491 (or 18488 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 90109755 is about 9492.6158144107. The cubic root of 90109755 is about 448.3225697571.

The spelling of 90109755 in words is "ninety million, one hundred nine thousand, seven hundred fifty-five".