82513139 has 2 divisors, whose sum is σ = 82513140. Its totient is φ = 82513138.

The previous prime is 82513117. The next prime is 82513163. The reversal of 82513139 is 93131528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82513139 - 2¹² = 82509043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82513169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41256569 + 41256570.

It is an arithmetic number, because the mean of its divisors is an integer number (41256570).

Almost surely, 2^82513139 is an apocalyptic number.

82513139 is a deficient number, since it is larger than the sum of its proper divisors (1).

82513139 is an equidigital number, since it uses as much as digits as its factorization.

82513139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 82513139 is about 9083.6743116428. The cubic root of 82513139 is about 435.3524936058.

The spelling of 82513139 in words is "eighty-two million, five hundred thirteen thousand, one hundred thirty-nine".