626688047 has 2 divisors, whose sum is σ = 626688048. Its totient is φ = 626688046.

The previous prime is 626687921. The next prime is 626688053. The reversal of 626688047 is 740886626.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 626688047 - 2²⁰ = 625639471 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 626687992 and 626688010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626688067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313344023 + 313344024.

It is an arithmetic number, because the mean of its divisors is an integer number (313344024).

Almost surely, 2^626688047 is an apocalyptic number.

626688047 is a deficient number, since it is larger than the sum of its proper divisors (1).

626688047 is an equidigital number, since it uses as much as digits as its factorization.

626688047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 626688047 is about 25033.7381747113. The cubic root of 626688047 is about 855.7570199915.

The spelling of 626688047 in words is "six hundred twenty-six million, six hundred eighty-eight thousand, forty-seven".