102831979 has 2 divisors, whose sum is σ = 102831980. Its totient is φ = 102831978.

The previous prime is 102831959. The next prime is 102832013. The reversal of 102831979 is 979138201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102831979 - 2⁹ = 102831467 is a prime.

It is not a weakly prime, because it can be changed into another prime (102831959) 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, 51415989 + 51415990.

It is an arithmetic number, because the mean of its divisors is an integer number (51415990).

Almost surely, 2^102831979 is an apocalyptic number.

102831979 is a deficient number, since it is larger than the sum of its proper divisors (1).

102831979 is an equidigital number, since it uses as much as digits as its factorization.

102831979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 102831979 is about 10140.6103859679. The cubic root of 102831979 is about 468.4997871982.

The spelling of 102831979 in words is "one hundred two million, eight hundred thirty-one thousand, nine hundred seventy-nine".