626620387 has 2 divisors, whose sum is σ = 626620388. Its totient is φ = 626620386.

The previous prime is 626620363. The next prime is 626620417. The reversal of 626620387 is 783026626.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626620387 is a prime.

It is a super-3 number, since 3×626620387³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626620087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313310193 + 313310194.

It is an arithmetic number, because the mean of its divisors is an integer number (313310194).

Almost surely, 2^626620387 is an apocalyptic number.

626620387 is a deficient number, since it is larger than the sum of its proper divisors (1).

626620387 is an equidigital number, since it uses as much as digits as its factorization.

626620387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 626620387 is about 25032.3867619530. The cubic root of 626620387 is about 855.7262217849.

The spelling of 626620387 in words is "six hundred twenty-six million, six hundred twenty thousand, three hundred eighty-seven".