102072979819 has 2 divisors, whose sum is σ = 102072979820. Its totient is φ = 102072979818.

The previous prime is 102072979763. The next prime is 102072979889. The reversal of 102072979819 is 918979270201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102072979819 - 2²⁷ = 101938762091 is a prime.

It is a super-2 number, since 2×102072979819² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102072979819.

It is not a weakly prime, because it can be changed into another prime (102072979889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51036489909 + 51036489910.

It is an arithmetic number, because the mean of its divisors is an integer number (51036489910).

Almost surely, 2^102072979819 is an apocalyptic number.

102072979819 is a deficient number, since it is larger than the sum of its proper divisors (1).

102072979819 is an equidigital number, since it uses as much as digits as its factorization.

102072979819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 102072979819 in words is "one hundred two billion, seventy-two million, nine hundred seventy-nine thousand, eight hundred nineteen".