122951977 has 2 divisors, whose sum is σ = 122951978. Its totient is φ = 122951976.

The previous prime is 122951971. The next prime is 122951981. The reversal of 122951977 is 779159221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75672601 + 47279376 = 8699^2 + 6876^2 .

It is an emirp because it is prime and its reverse (779159221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122951977 - 2⁷ = 122951849 is a prime.

It is not a weakly prime, because it can be changed into another prime (122951971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61475988 + 61475989.

It is an arithmetic number, because the mean of its divisors is an integer number (61475989).

Almost surely, 2^122951977 is an apocalyptic number.

It is an amenable number.

122951977 is a deficient number, since it is larger than the sum of its proper divisors (1).

122951977 is an equidigital number, since it uses as much as digits as its factorization.

122951977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 43.

The square root of 122951977 is about 11088.3712509999. The cubic root of 122951977 is about 497.2542520033.

The spelling of 122951977 in words is "one hundred twenty-two million, nine hundred fifty-one thousand, nine hundred seventy-seven".