628937131 has 2 divisors, whose sum is σ = 628937132. Its totient is φ = 628937130.

The previous prime is 628937077. The next prime is 628937149. The reversal of 628937131 is 131739826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628937131 - 2⁷ = 628937003 is a prime.

It is a super-2 number, since 2×628937131² = 791123829501022322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628937161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314468565 + 314468566.

It is an arithmetic number, because the mean of its divisors is an integer number (314468566).

Almost surely, 2^628937131 is an apocalyptic number.

628937131 is a deficient number, since it is larger than the sum of its proper divisors (1).

628937131 is an equidigital number, since it uses as much as digits as its factorization.

628937131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 628937131 is about 25078.6190010535. The cubic root of 628937131 is about 856.7795231683.

The spelling of 628937131 in words is "six hundred twenty-eight million, nine hundred thirty-seven thousand, one hundred thirty-one".