627261997 has 2 divisors, whose sum is σ = 627261998. Its totient is φ = 627261996.

The previous prime is 627261989. The next prime is 627262019. The reversal of 627261997 is 799162726.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511935876 + 115326121 = 22626^2 + 10739^2 .

It is a cyclic number.

It is not a de Polignac number, because 627261997 - 2³ = 627261989 is a prime.

It is a super-2 number, since 2×627261997² = 786915225760856018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 627261997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (627261907) 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, 313630998 + 313630999.

It is an arithmetic number, because the mean of its divisors is an integer number (313630999).

Almost surely, 2^627261997 is an apocalyptic number.

It is an amenable number.

627261997 is a deficient number, since it is larger than the sum of its proper divisors (1).

627261997 is an equidigital number, since it uses as much as digits as its factorization.

627261997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 627261997 is about 25045.1990808618. The cubic root of 627261997 is about 856.0181876103.

The spelling of 627261997 in words is "six hundred twenty-seven million, two hundred sixty-one thousand, nine hundred ninety-seven".