79862513 has 2 divisors, whose sum is σ = 79862514. Its totient is φ = 79862512.

The previous prime is 79862483. The next prime is 79862533. The reversal of 79862513 is 31526897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77651344 + 2211169 = 8812^2 + 1487^2 .

It is a cyclic number.

It is not a de Polignac number, because 79862513 - 2¹² = 79858417 is a prime.

It is not a weakly prime, because it can be changed into another prime (79862533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39931256 + 39931257.

It is an arithmetic number, because the mean of its divisors is an integer number (39931257).

Almost surely, 2^79862513 is an apocalyptic number.

It is an amenable number.

79862513 is a deficient number, since it is larger than the sum of its proper divisors (1).

79862513 is an equidigital number, since it uses as much as digits as its factorization.

79862513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 79862513 is about 8936.5828480466. The cubic root of 79862513 is about 430.6399574979.

The spelling of 79862513 in words is "seventy-nine million, eight hundred sixty-two thousand, five hundred thirteen".