121875979 has 2 divisors, whose sum is σ = 121875980. Its totient is φ = 121875978.

The previous prime is 121875913. The next prime is 121875983. The reversal of 121875979 is 979578121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121875979 is a prime.

It is not a weakly prime, because it can be changed into another prime (121875989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60937989 + 60937990.

It is an arithmetic number, because the mean of its divisors is an integer number (60937990).

Almost surely, 2^121875979 is an apocalyptic number.

121875979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121875979 is an equidigital number, since it uses as much as digits as its factorization.

121875979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 49.

The square root of 121875979 is about 11039.7454227894. The cubic root of 121875979 is about 495.7994482191.

The spelling of 121875979 in words is "one hundred twenty-one million, eight hundred seventy-five thousand, nine hundred seventy-nine".