656122249 has 2 divisors, whose sum is σ = 656122250. Its totient is φ = 656122248.

The previous prime is 656122217. The next prime is 656122253. The reversal of 656122249 is 942221656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632774025 + 23348224 = 25155^2 + 4832^2 .

It is a cyclic number.

It is not a de Polignac number, because 656122249 - 2⁵ = 656122217 is a prime.

It is equal to p_34095079 and since 656122249 and 34095079 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (656122349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328061124 + 328061125.

It is an arithmetic number, because the mean of its divisors is an integer number (328061125).

Almost surely, 2^656122249 is an apocalyptic number.

It is an amenable number.

656122249 is a deficient number, since it is larger than the sum of its proper divisors (1).

656122249 is an equidigital number, since it uses as much as digits as its factorization.

656122249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 656122249 is about 25614.8833493342. The cubic root of 656122249 is about 868.9502682441.

The spelling of 656122249 in words is "six hundred fifty-six million, one hundred twenty-two thousand, two hundred forty-nine".