90195877 has 4 divisors (see below), whose sum is σ = 91897740. Its totient is φ = 88494016.

The previous prime is 90195871. The next prime is 90195883. The reversal of 90195877 is 77859109.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (90195871) and next prime (90195883).

It can be written as a sum of positive squares in 2 ways, for example, as 77422401 + 12773476 = 8799^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 90195877 - 2¹⁵ = 90163109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90195871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850852 + ... + 850957.

It is an arithmetic number, because the mean of its divisors is an integer number (22974435).

Almost surely, 2^90195877 is an apocalyptic number.

It is an amenable number.

90195877 is a deficient number, since it is larger than the sum of its proper divisors (1701863).

90195877 is a wasteful number, since it uses less digits than its factorization.

90195877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701862.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 90195877 is about 9497.1509938507. The cubic root of 90195877 is about 448.4653517170.

The spelling of 90195877 in words is "ninety million, one hundred ninety-five thousand, eight hundred seventy-seven".