628937161 has 2 divisors, whose sum is σ = 628937162. Its totient is φ = 628937160.

The previous prime is 628937149. The next prime is 628937173. The reversal of 628937161 is 161739826.

It is a balanced prime because it is at equal distance from previous prime (628937149) and next prime (628937173).

It can be written as a sum of positive squares in only one way, i.e., 622203136 + 6734025 = 24944^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 628937161 - 2²¹ = 626840009 is a prime.

It is not a weakly prime, because it can be changed into another prime (628937131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314468580 + 314468581.

It is an arithmetic number, because the mean of its divisors is an integer number (314468581).

Almost surely, 2^628937161 is an apocalyptic number.

It is an amenable number.

628937161 is a deficient number, since it is larger than the sum of its proper divisors (1).

628937161 is an equidigital number, since it uses as much as digits as its factorization.

628937161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 628937161 is about 25078.6195991725. The cubic root of 628937161 is about 856.7795367910.

The spelling of 628937161 in words is "six hundred twenty-eight million, nine hundred thirty-seven thousand, one hundred sixty-one".