104637521 has 2 divisors, whose sum is σ = 104637522. Its totient is φ = 104637520.

The previous prime is 104637497. The next prime is 104637523. The reversal of 104637521 is 125736401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58736896 + 45900625 = 7664^2 + 6775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104637521 is a prime.

It is a Sophie Germain prime.

Together with 104637523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (104637523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52318760 + 52318761.

It is an arithmetic number, because the mean of its divisors is an integer number (52318761).

Almost surely, 2^104637521 is an apocalyptic number.

It is an amenable number.

104637521 is a deficient number, since it is larger than the sum of its proper divisors (1).

104637521 is an equidigital number, since it uses as much as digits as its factorization.

104637521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 104637521 is about 10229.2483106043. The cubic root of 104637521 is about 471.2258943501.

The spelling of 104637521 in words is "one hundred four million, six hundred thirty-seven thousand, five hundred twenty-one".