102690979 has 2 divisors, whose sum is σ = 102690980. Its totient is φ = 102690978.

The previous prime is 102690961. The next prime is 102690983. The reversal of 102690979 is 979096201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102690979 - 2¹⁵ = 102658211 is a prime.

It is not a weakly prime, because it can be changed into another prime (102690919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51345489 + 51345490.

It is an arithmetic number, because the mean of its divisors is an integer number (51345490).

Almost surely, 2^102690979 is an apocalyptic number.

102690979 is a deficient number, since it is larger than the sum of its proper divisors (1).

102690979 is an equidigital number, since it uses as much as digits as its factorization.

102690979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 102690979 is about 10133.6557569319. The cubic root of 102690979 is about 468.2855584920.

The spelling of 102690979 in words is "one hundred two million, six hundred ninety thousand, nine hundred seventy-nine".