1277993 has 2 divisors, whose sum is σ = 1277994. Its totient is φ = 1277992.

The previous prime is 1277971. The next prime is 1278007. The reversal of 1277993 is 3997721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 94249 = 1088^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277993 - 2¹⁰ = 1276969 is a prime.

It is a super-2 number, since 2×1277993² = 3266532216098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1277093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638996 + 638997.

It is an arithmetic number, because the mean of its divisors is an integer number (638997).

2^1277993 is an apocalyptic number.

It is an amenable number.

1277993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277993 is an equidigital number, since it uses as much as digits as its factorization.

1277993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 38.

The square root of 1277993 is about 1130.4835248689. The cubic root of 1277993 is about 108.5199266848.

The spelling of 1277993 in words is "one million, two hundred seventy-seven thousand, nine hundred ninety-three".