626811401 has 2 divisors, whose sum is σ = 626811402. Its totient is φ = 626811400.

The previous prime is 626811397. The next prime is 626811461. The reversal of 626811401 is 104118626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491065600 + 135745801 = 22160^2 + 11651^2 .

It is a cyclic number.

It is not a de Polignac number, because 626811401 - 2² = 626811397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (626811461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313405700 + 313405701.

It is an arithmetic number, because the mean of its divisors is an integer number (313405701).

Almost surely, 2^626811401 is an apocalyptic number.

It is an amenable number.

626811401 is a deficient number, since it is larger than the sum of its proper divisors (1).

626811401 is an equidigital number, since it uses as much as digits as its factorization.

626811401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 626811401 is about 25036.2018085811. The cubic root of 626811401 is about 855.8131638878.

The spelling of 626811401 in words is "six hundred twenty-six million, eight hundred eleven thousand, four hundred one".