90755819 has 32 divisors (see below), whose sum is σ = 118540800. Its totient is φ = 67415040.

The previous prime is 90755813. The next prime is 90755831. The reversal of 90755819 is 91855709.

It is a happy number.

It is not a de Polignac number, because 90755819 - 2²⁰ = 89707243 is a prime.

It is a super-2 number, since 2×90755819² = 16473237364721522, 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 90755819.

It is not an unprimeable number, because it can be changed into a prime (90755813) 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, 216392 + ... + 216810.

It is an arithmetic number, because the mean of its divisors is an integer number (3704400).

Almost surely, 2^90755819 is an apocalyptic number.

90755819 is a deficient number, since it is larger than the sum of its proper divisors (27784981).

90755819 is a wasteful number, since it uses less digits than its factorization.

90755819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 90755819 is about 9526.5848550254. The cubic root of 90755819 is about 449.3914721185.

The spelling of 90755819 in words is "ninety million, seven hundred fifty-five thousand, eight hundred nineteen".