90214517 has 4 divisors (see below), whose sum is σ = 91485216. Its totient is φ = 88943820.

The previous prime is 90214477. The next prime is 90214519. The reversal of 90214517 is 71541209.

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: 71541209 = 173 ⋅413533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90214517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90214517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90214519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635243 + ... + 635384.

It is an arithmetic number, because the mean of its divisors is an integer number (22871304).

Almost surely, 2^90214517 is an apocalyptic number.

It is an amenable number.

90214517 is a deficient number, since it is larger than the sum of its proper divisors (1270699).

90214517 is a wasteful number, since it uses less digits than its factorization.

90214517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270698.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 90214517 is about 9498.1322900874. The cubic root of 90214517 is about 448.4962430713.

The spelling of 90214517 in words is "ninety million, two hundred fourteen thousand, five hundred seventeen".