102979979 has 2 divisors, whose sum is σ = 102979980. Its totient is φ = 102979978.

The previous prime is 102979973. The next prime is 102980041. The reversal of 102979979 is 979979201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102979979 - 2⁴ = 102979963 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102979979.

It is not a weakly prime, because it can be changed into another prime (102979973) 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, 51489989 + 51489990.

It is an arithmetic number, because the mean of its divisors is an integer number (51489990).

Almost surely, 2^102979979 is an apocalyptic number.

102979979 is a deficient number, since it is larger than the sum of its proper divisors (1).

102979979 is an equidigital number, since it uses as much as digits as its factorization.

102979979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 53.

The square root of 102979979 is about 10147.9051532816. The cubic root of 102979979 is about 468.7244408227.

The spelling of 102979979 in words is "one hundred two million, nine hundred seventy-nine thousand, nine hundred seventy-nine".