102513409 has 2 divisors, whose sum is σ = 102513410. Its totient is φ = 102513408.

The previous prime is 102513403. The next prime is 102513443. The reversal of 102513409 is 904315201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90782784 + 11730625 = 9528^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 102513409 - 2⁵ = 102513377 is a prime.

It is not a weakly prime, because it can be changed into another prime (102513403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51256704 + 51256705.

It is an arithmetic number, because the mean of its divisors is an integer number (51256705).

Almost surely, 2^102513409 is an apocalyptic number.

It is an amenable number.

102513409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102513409 is an equidigital number, since it uses as much as digits as its factorization.

102513409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 102513409 is about 10124.8905673099. The cubic root of 102513409 is about 468.0154878966.

The spelling of 102513409 in words is "one hundred two million, five hundred thirteen thousand, four hundred nine".