84979613 has 2 divisors, whose sum is σ = 84979614. Its totient is φ = 84979612.

The previous prime is 84979579. The next prime is 84979621. The reversal of 84979613 is 31697948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59799289 + 25180324 = 7733^2 + 5018^2 .

It is a cyclic number.

It is not a de Polignac number, because 84979613 - 2¹⁸ = 84717469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84979673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42489806 + 42489807.

It is an arithmetic number, because the mean of its divisors is an integer number (42489807).

Almost surely, 2^84979613 is an apocalyptic number.

It is an amenable number.

84979613 is a deficient number, since it is larger than the sum of its proper divisors (1).

84979613 is an equidigital number, since it uses as much as digits as its factorization.

84979613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 84979613 is about 9218.4387506779. The cubic root of 84979613 is about 439.6478121829.

The spelling of 84979613 in words is "eighty-four million, nine hundred seventy-nine thousand, six hundred thirteen".