122578949 has 2 divisors, whose sum is σ = 122578950. Its totient is φ = 122578948.

The previous prime is 122578933. The next prime is 122578999. The reversal of 122578949 is 949875221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102373924 + 20205025 = 10118^2 + 4495^2 .

It is a cyclic number.

It is not a de Polignac number, because 122578949 - 2⁴ = 122578933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122578909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61289474 + 61289475.

It is an arithmetic number, because the mean of its divisors is an integer number (61289475).

Almost surely, 2^122578949 is an apocalyptic number.

It is an amenable number.

122578949 is a deficient number, since it is larger than the sum of its proper divisors (1).

122578949 is an equidigital number, since it uses as much as digits as its factorization.

122578949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 122578949 is about 11071.5377884014. The cubic root of 122578949 is about 496.7508639644.

The spelling of 122578949 in words is "one hundred twenty-two million, five hundred seventy-eight thousand, nine hundred forty-nine".