626761 has 2 divisors, whose sum is σ = 626762. Its totient is φ = 626760.

The previous prime is 626749. The next prime is 626771. The reversal of 626761 is 167626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571536 + 55225 = 756^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 626761 - 2¹⁵ = 593993 is a prime.

It is a super-2 number, since 2×626761² = 785658702242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (626701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313380 + 313381.

It is an arithmetic number, because the mean of its divisors is an integer number (313381).

2⁶²⁶⁷⁶¹ is an apocalyptic number.

It is an amenable number.

626761 is a deficient number, since it is larger than the sum of its proper divisors (1).

626761 is an equidigital number, since it uses as much as digits as its factorization.

626761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 626761 is about 791.6823858089. The cubic root of 626761 is about 85.5790225039.

It can be divided in two parts, 6267 and 61, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 626761 in words is "six hundred twenty-six thousand, seven hundred sixty-one".