90646513 has 2 divisors, whose sum is σ = 90646514. Its totient is φ = 90646512.

The previous prime is 90646477. The next prime is 90646529. The reversal of 90646513 is 31564609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77228944 + 13417569 = 8788^2 + 3663^2 .

It is a cyclic number.

It is not a de Polignac number, because 90646513 - 2¹⁷ = 90515441 is a prime.

It is a super-3 number, since 3×90646513³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (90646583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323256 + 45323257.

It is an arithmetic number, because the mean of its divisors is an integer number (45323257).

Almost surely, 2^90646513 is an apocalyptic number.

It is an amenable number.

90646513 is a deficient number, since it is larger than the sum of its proper divisors (1).

90646513 is an equidigital number, since it uses as much as digits as its factorization.

90646513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90646513 is about 9520.8462333975. The cubic root of 90646513 is about 449.2109844522.

The spelling of 90646513 in words is "ninety million, six hundred forty-six thousand, five hundred thirteen".