90211517 has 8 divisors (see below), whose sum is σ = 98515872. Its totient is φ = 81924400.

The previous prime is 90211493. The next prime is 90211553. The reversal of 90211517 is 71511209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90211517 - 2⁶ = 90211453 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 (90211567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8243 + ... + 15759.

It is an arithmetic number, because the mean of its divisors is an integer number (12314484).

Almost surely, 2^90211517 is an apocalyptic number.

It is an amenable number.

90211517 is a deficient number, since it is larger than the sum of its proper divisors (8304355).

90211517 is a wasteful number, since it uses less digits than its factorization.

90211517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8619.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 90211517 is about 9497.9743629892. The cubic root of 90211517 is about 448.4912715741.

The spelling of 90211517 in words is "ninety million, two hundred eleven thousand, five hundred seventeen".