90119857 has 4 divisors (see below), whose sum is σ = 90328420. Its totient is φ = 89911296.

The previous prime is 90119851. The next prime is 90119867. The reversal of 90119857 is 75891109.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75891109 = 7 ⋅10841587.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 84474481 = 2376^2 + 9191^2 .

It is a cyclic number.

It is not a de Polignac number, because 90119857 - 2¹⁵ = 90087089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90119851) 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, 103632 + ... + 104497.

It is an arithmetic number, because the mean of its divisors is an integer number (22582105).

Almost surely, 2^90119857 is an apocalyptic number.

It is an amenable number.

90119857 is a deficient number, since it is larger than the sum of its proper divisors (208563).

90119857 is a wasteful number, since it uses less digits than its factorization.

90119857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208562.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 90119857 is about 9493.1478972994. The cubic root of 90119857 is about 448.3393226061.

The spelling of 90119857 in words is "ninety million, one hundred nineteen thousand, eight hundred fifty-seven".