90680537 has 2 divisors, whose sum is σ = 90680538. Its totient is φ = 90680536.

The previous prime is 90680461. The next prime is 90680539. The reversal of 90680537 is 73508609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68740681 + 21939856 = 8291^2 + 4684^2 .

It is a cyclic number.

It is not a de Polignac number, because 90680537 - 2⁸ = 90680281 is a prime.

Together with 90680539, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90680537.

It is not a weakly prime, because it can be changed into another prime (90680539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45340268 + 45340269.

It is an arithmetic number, because the mean of its divisors is an integer number (45340269).

Almost surely, 2^90680537 is an apocalyptic number.

It is an amenable number.

90680537 is a deficient number, since it is larger than the sum of its proper divisors (1).

90680537 is an equidigital number, since it uses as much as digits as its factorization.

90680537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 90680537 is about 9522.6328817192. The cubic root of 90680537 is about 449.2671809241.

The spelling of 90680537 in words is "ninety million, six hundred eighty thousand, five hundred thirty-seven".