1297455673 has 2 divisors, whose sum is σ = 1297455674. Its totient is φ = 1297455672.

The previous prime is 1297455661. The next prime is 1297455683. The reversal of 1297455673 is 3765547921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1295136144 + 2319529 = 35988^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297455673 - 2⁹ = 1297455161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297455683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648727836 + 648727837.

It is an arithmetic number, because the mean of its divisors is an integer number (648727837).

Almost surely, 2^1297455673 is an apocalyptic number.

It is an amenable number.

1297455673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297455673 is an equidigital number, since it uses as much as digits as its factorization.

1297455673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 49.

The square root of 1297455673 is about 36020.2120065943. The cubic root of 1297455673 is about 1090.6804025605.

The spelling of 1297455673 in words is "one billion, two hundred ninety-seven million, four hundred fifty-five thousand, six hundred seventy-three".