90196257 has 4 divisors (see below), whose sum is σ = 120261680. Its totient is φ = 60130836.

The previous prime is 90196231. The next prime is 90196259. The reversal of 90196257 is 75269109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75269109 = 3 ⋅25089703.

It is not a de Polignac number, because 90196257 - 2⁶ = 90196193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90196259) 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, 15032707 + ... + 15032712.

It is an arithmetic number, because the mean of its divisors is an integer number (30065420).

Almost surely, 2^90196257 is an apocalyptic number.

It is an amenable number.

90196257 is a deficient number, since it is larger than the sum of its proper divisors (30065423).

90196257 is a wasteful number, since it uses less digits than its factorization.

90196257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30065422.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 90196257 is about 9497.1709998294. The cubic root of 90196257 is about 448.4659815189.

The spelling of 90196257 in words is "ninety million, one hundred ninety-six thousand, two hundred fifty-seven".