626679161 has 2 divisors, whose sum is σ = 626679162. Its totient is φ = 626679160.

The previous prime is 626679139. The next prime is 626679181. The reversal of 626679161 is 161976626.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597313600 + 29365561 = 24440^2 + 5419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626679161 is a prime.

It is not a weakly prime, because it can be changed into another prime (626679121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313339580 + 313339581.

It is an arithmetic number, because the mean of its divisors is an integer number (313339581).

Almost surely, 2^626679161 is an apocalyptic number.

It is an amenable number.

626679161 is a deficient number, since it is larger than the sum of its proper divisors (1).

626679161 is an equidigital number, since it uses as much as digits as its factorization.

626679161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 626679161 is about 25033.5606935969. The cubic root of 626679161 is about 855.7529752929.

The spelling of 626679161 in words is "six hundred twenty-six million, six hundred seventy-nine thousand, one hundred sixty-one".