90951517 has 2 divisors, whose sum is σ = 90951518. Its totient is φ = 90951516.

The previous prime is 90951473. The next prime is 90951521. The reversal of 90951517 is 71515909.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90839961 + 111556 = 9531^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 90951517 - 2¹⁹ = 90427229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90955517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45475758 + 45475759.

It is an arithmetic number, because the mean of its divisors is an integer number (45475759).

Almost surely, 2^90951517 is an apocalyptic number.

It is an amenable number.

90951517 is a deficient number, since it is larger than the sum of its proper divisors (1).

90951517 is an equidigital number, since it uses as much as digits as its factorization.

90951517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 90951517 is about 9536.8504759171. The cubic root of 90951517 is about 449.7142498627.

The spelling of 90951517 in words is "ninety million, nine hundred fifty-one thousand, five hundred seventeen".