121875913 has 2 divisors, whose sum is σ = 121875914. Its totient is φ = 121875912.

The previous prime is 121875857. The next prime is 121875979. The reversal of 121875913 is 319578121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71707024 + 50168889 = 8468^2 + 7083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121875913 is a prime.

It is not a weakly prime, because it can be changed into another prime (121875983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60937956 + 60937957.

It is an arithmetic number, because the mean of its divisors is an integer number (60937957).

Almost surely, 2^121875913 is an apocalyptic number.

It is an amenable number.

121875913 is a deficient number, since it is larger than the sum of its proper divisors (1).

121875913 is an equidigital number, since it uses as much as digits as its factorization.

121875913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 37.

The square root of 121875913 is about 11039.7424335897. The cubic root of 121875913 is about 495.7993587216.

The spelling of 121875913 in words is "one hundred twenty-one million, eight hundred seventy-five thousand, nine hundred thirteen".