626749 has 2 divisors, whose sum is σ = 626750. Its totient is φ = 626748.

The previous prime is 626741. The next prime is 626761. The reversal of 626749 is 947626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 101124 = 725^2 + 318^2 .

It is a cyclic number.

It is not a de Polignac number, because 626749 - 2³ = 626741 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313374 + 313375.

It is an arithmetic number, because the mean of its divisors is an integer number (313375).

2⁶²⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

626749 is a deficient number, since it is larger than the sum of its proper divisors (1).

626749 is an equidigital number, since it uses as much as digits as its factorization.

626749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 626749 is about 791.6748069757. The cubic root of 626749 is about 85.5784763336.

The spelling of 626749 in words is "six hundred twenty-six thousand, seven hundred forty-nine".