90351217 has 4 divisors (see below), whose sum is σ = 98564976. Its totient is φ = 82137460.

The previous prime is 90351203. The next prime is 90351223. The reversal of 90351217 is 71215309.

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: 71215309 = 11 ⋅6474119.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90351217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90351257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4106863 + ... + 4106884.

It is an arithmetic number, because the mean of its divisors is an integer number (24641244).

Almost surely, 2^90351217 is an apocalyptic number.

It is an amenable number.

90351217 is a deficient number, since it is larger than the sum of its proper divisors (8213759).

90351217 is a wasteful number, since it uses less digits than its factorization.

90351217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213758.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 90351217 is about 9505.3257177227. The cubic root of 90351217 is about 448.7226607905.

The spelling of 90351217 in words is "ninety million, three hundred fifty-one thousand, two hundred seventeen".