1277633057 has 2 divisors, whose sum is σ = 1277633058. Its totient is φ = 1277633056.

The previous prime is 1277632981. The next prime is 1277633083. The reversal of 1277633057 is 7503367721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250966161 + 26666896 = 35369^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277633057 - 2¹⁶ = 1277567521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277633087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638816528 + 638816529.

It is an arithmetic number, because the mean of its divisors is an integer number (638816529).

Almost surely, 2^1277633057 is an apocalyptic number.

It is an amenable number.

1277633057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277633057 is an equidigital number, since it uses as much as digits as its factorization.

1277633057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 185220, while the sum is 41.

The square root of 1277633057 is about 35743.9932995741. The cubic root of 1277633057 is about 1085.0973762124.

The spelling of 1277633057 in words is "one billion, two hundred seventy-seven million, six hundred thirty-three thousand, fifty-seven".