102979949 has 2 divisors, whose sum is σ = 102979950. Its totient is φ = 102979948.

The previous prime is 102979939. The next prime is 102979963. The reversal of 102979949 is 949979201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99301225 + 3678724 = 9965^2 + 1918^2 .

It is an emirp because it is prime and its reverse (949979201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102979949 - 2²⁰ = 101931373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102979897 and 102979906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102979909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51489974 + 51489975.

It is an arithmetic number, because the mean of its divisors is an integer number (51489975).

Almost surely, 2^102979949 is an apocalyptic number.

It is an amenable number.

102979949 is a deficient number, since it is larger than the sum of its proper divisors (1).

102979949 is an equidigital number, since it uses as much as digits as its factorization.

102979949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 102979949 is about 10147.9036751439. The cubic root of 102979949 is about 468.7243953066.

The spelling of 102979949 in words is "one hundred two million, nine hundred seventy-nine thousand, nine hundred forty-nine".