1277046997 has 2 divisors, whose sum is σ = 1277046998. Its totient is φ = 1277046996.

The previous prime is 1277046973. The next prime is 1277047061. The reversal of 1277046997 is 7996407721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646735761 + 630311236 = 25431^2 + 25106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277046997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277046907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638523498 + 638523499.

It is an arithmetic number, because the mean of its divisors is an integer number (638523499).

Almost surely, 2^1277046997 is an apocalyptic number.

It is an amenable number.

1277046997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277046997 is an equidigital number, since it uses as much as digits as its factorization.

1277046997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The square root of 1277046997 is about 35735.7943384501. The cubic root of 1277046997 is about 1084.9314366975.

The spelling of 1277046997 in words is "one billion, two hundred seventy-seven million, forty-six thousand, nine hundred ninety-seven".