83797979 has 2 divisors, whose sum is σ = 83797980. Its totient is φ = 83797978.

The previous prime is 83797951. The next prime is 83797997. The reversal of 83797979 is 97979738.

Together with next prime (83797997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83797979 - 2²⁴ = 67020763 is a prime.

It is not a weakly prime, because it can be changed into another prime (83797939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41898989 + 41898990.

It is an arithmetic number, because the mean of its divisors is an integer number (41898990).

Almost surely, 2^83797979 is an apocalyptic number.

83797979 is a deficient number, since it is larger than the sum of its proper divisors (1).

83797979 is an equidigital number, since it uses as much as digits as its factorization.

83797979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6001128, while the sum is 59.

The square root of 83797979 is about 9154.1236063317. The cubic root of 83797979 is about 437.6005389621.

The spelling of 83797979 in words is "eighty-three million, seven hundred ninety-seven thousand, nine hundred seventy-nine".