90212617 has 8 divisors (see below), whose sum is σ = 99600480. Its totient is φ = 81022560.

The previous prime is 90212611. The next prime is 90212657. The reversal of 90212617 is 71621209.

It is a happy number.

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 90212617 - 2¹¹ = 90210569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90212611) 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, 48492 + ... + 50317.

It is an arithmetic number, because the mean of its divisors is an integer number (12450060).

Almost surely, 2^90212617 is an apocalyptic number.

It is an amenable number.

90212617 is a deficient number, since it is larger than the sum of its proper divisors (9387863).

90212617 is a wasteful number, since it uses less digits than its factorization.

90212617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98903.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 90212617 is about 9498.0322698967. The cubic root of 90212617 is about 448.4930944692.

The spelling of 90212617 in words is "ninety million, two hundred twelve thousand, six hundred seventeen".