628941377 has 2 divisors, whose sum is σ = 628941378. Its totient is φ = 628941376.

The previous prime is 628941347. The next prime is 628941403. The reversal of 628941377 is 773149826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610287616 + 18653761 = 24704^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 628941377 - 2¹⁰ = 628940353 is a prime.

It is a super-2 number, since 2×628941377² = 791134511405312258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628941337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314470688 + 314470689.

It is an arithmetic number, because the mean of its divisors is an integer number (314470689).

Almost surely, 2^628941377 is an apocalyptic number.

It is an amenable number.

628941377 is a deficient number, since it is larger than the sum of its proper divisors (1).

628941377 is an equidigital number, since it uses as much as digits as its factorization.

628941377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 628941377 is about 25078.7036546948. The cubic root of 628941377 is about 856.7814512241.

The spelling of 628941377 in words is "six hundred twenty-eight million, nine hundred forty-one thousand, three hundred seventy-seven".