83139228979 has 2 divisors, whose sum is σ = 83139228980. Its totient is φ = 83139228978.

The previous prime is 83139228973. The next prime is 83139229009. The reversal of 83139228979 is 97982293138.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83139228979 - 2⁵ = 83139228947 is a prime.

It is not a weakly prime, because it can be changed into another prime (83139228973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41569614489 + 41569614490.

It is an arithmetic number, because the mean of its divisors is an integer number (41569614490).

Almost surely, 2^83139228979 is an apocalyptic number.

83139228979 is a deficient number, since it is larger than the sum of its proper divisors (1).

83139228979 is an equidigital number, since it uses as much as digits as its factorization.

83139228979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The spelling of 83139228979 in words is "eighty-three billion, one hundred thirty-nine million, two hundred twenty-eight thousand, nine hundred seventy-nine".