626423449 has 2 divisors, whose sum is σ = 626423450. Its totient is φ = 626423448.

The previous prime is 626423419. The next prime is 626423453. The reversal of 626423449 is 944324626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437855625 + 188567824 = 20925^2 + 13732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626423449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626423419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313211724 + 313211725.

It is an arithmetic number, because the mean of its divisors is an integer number (313211725).

Almost surely, 2^626423449 is an apocalyptic number.

It is an amenable number.

626423449 is a deficient number, since it is larger than the sum of its proper divisors (1).

626423449 is an equidigital number, since it uses as much as digits as its factorization.

626423449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 40.

The square root of 626423449 is about 25028.4527887762. The cubic root of 626423449 is about 855.6365648080.

The spelling of 626423449 in words is "six hundred twenty-six million, four hundred twenty-three thousand, four hundred forty-nine".