1273627997 has 2 divisors, whose sum is σ = 1273627998. Its totient is φ = 1273627996.

The previous prime is 1273627961. The next prime is 1273628017. The reversal of 1273627997 is 7997263721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696379321 + 577248676 = 26389^2 + 24026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273627997 - 2¹⁶ = 1273562461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1273627907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636813998 + 636813999.

It is an arithmetic number, because the mean of its divisors is an integer number (636813999).

Almost surely, 2^1273627997 is an apocalyptic number.

It is an amenable number.

1273627997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273627997 is an equidigital number, since it uses as much as digits as its factorization.

1273627997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000376, while the sum is 53.

The square root of 1273627997 is about 35687.9250867853. The cubic root of 1273627997 is about 1083.9623531108.

The spelling of 1273627997 in words is "one billion, two hundred seventy-three million, six hundred twenty-seven thousand, nine hundred ninety-seven".