102620979 has 8 divisors (see below), whose sum is σ = 152031120. Its totient is φ = 68413968.

The previous prime is 102620939. The next prime is 102621011. The reversal of 102620979 is 979026201.

It is not a de Polignac number, because 102620979 - 2⁷ = 102620851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102620939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900362 + ... + 1900415.

It is an arithmetic number, because the mean of its divisors is an integer number (19003890).

Almost surely, 2^102620979 is an apocalyptic number.

102620979 is a deficient number, since it is larger than the sum of its proper divisors (49410141).

102620979 is an equidigital number, since it uses as much as digits as its factorization.

102620979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800786 (or 3800780 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 102620979 is about 10130.2013306745. The cubic root of 102620979 is about 468.1791309671.

The spelling of 102620979 in words is "one hundred two million, six hundred twenty thousand, nine hundred seventy-nine".