90190555 has 16 divisors (see below), whose sum is σ = 133205184. Its totient is φ = 57087360.

The previous prime is 90190547. The next prime is 90190561. The reversal of 90190555 is 55509109.

It is not a de Polignac number, because 90190555 - 2³ = 90190547 is a prime.

It is a super-2 number, since 2×90190555² = 16268672422416050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90190555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98656 + ... + 99565.

It is an arithmetic number, because the mean of its divisors is an integer number (8325324).

Almost surely, 2^90190555 is an apocalyptic number.

90190555 is a deficient number, since it is larger than the sum of its proper divisors (43014629).

90190555 is a wasteful number, since it uses less digits than its factorization.

90190555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198246.

The product of its (nonzero) digits is 10125, while the sum is 34.

The square root of 90190555 is about 9496.8708004268. The cubic root of 90190555 is about 448.4565309903.

The spelling of 90190555 in words is "ninety million, one hundred ninety thousand, five hundred fifty-five".