90213177 has 4 divisors (see below), whose sum is σ = 120284240. Its totient is φ = 60142116.

The previous prime is 90213157. The next prime is 90213191. The reversal of 90213177 is 77131209.

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.

It is not a de Polignac number, because 90213177 - 2¹² = 90209081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90213127) 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, 15035527 + ... + 15035532.

It is an arithmetic number, because the mean of its divisors is an integer number (30071060).

Almost surely, 2^90213177 is an apocalyptic number.

It is an amenable number.

90213177 is a deficient number, since it is larger than the sum of its proper divisors (30071063).

90213177 is a wasteful number, since it uses less digits than its factorization.

90213177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30071062.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 90213177 is about 9498.0617496413. The cubic root of 90213177 is about 448.4940224828.

The spelling of 90213177 in words is "ninety million, two hundred thirteen thousand, one hundred seventy-seven".