122851913 has 2 divisors, whose sum is σ = 122851914. Its totient is φ = 122851912.

The previous prime is 122851909. The next prime is 122851969. The reversal of 122851913 is 319158221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96668224 + 26183689 = 9832^2 + 5117^2 .

It is a cyclic number.

It is not a de Polignac number, because 122851913 - 2² = 122851909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122851913.

It is not a weakly prime, because it can be changed into another prime (122851213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61425956 + 61425957.

It is an arithmetic number, because the mean of its divisors is an integer number (61425957).

Almost surely, 2^122851913 is an apocalyptic number.

It is an amenable number.

122851913 is a deficient number, since it is larger than the sum of its proper divisors (1).

122851913 is an equidigital number, since it uses as much as digits as its factorization.

122851913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 122851913 is about 11083.8582181477. The cubic root of 122851913 is about 497.1193192297.

The spelling of 122851913 in words is "one hundred twenty-two million, eight hundred fifty-one thousand, nine hundred thirteen".