627129649 has 2 divisors, whose sum is σ = 627129650. Its totient is φ = 627129648.

The previous prime is 627129631. The next prime is 627129697. The reversal of 627129649 is 946921726.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463110400 + 164019249 = 21520^2 + 12807^2 .

It is a cyclic number.

It is not a de Polignac number, because 627129649 - 2⁷ = 627129521 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 627129599 and 627129608.

It is not a weakly prime, because it can be changed into another prime (627129049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313564824 + 313564825.

It is an arithmetic number, because the mean of its divisors is an integer number (313564825).

Almost surely, 2^627129649 is an apocalyptic number.

It is an amenable number.

627129649 is a deficient number, since it is larger than the sum of its proper divisors (1).

627129649 is an equidigital number, since it uses as much as digits as its factorization.

627129649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 627129649 is about 25042.5567584462. The cubic root of 627129649 is about 855.9579787106.

It can be divided in two parts, 62712 and 9649, that added together give a square (72361 = 269²).

The spelling of 627129649 in words is "six hundred twenty-seven million, one hundred twenty-nine thousand, six hundred forty-nine".