1297797807 has 8 divisors (see below), whose sum is σ = 1759726080. Its totient is φ = 850534040.

The previous prime is 1297797779. The next prime is 1297797889. The reversal of 1297797807 is 7087977921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1297797807 - 2¹⁸ = 1297535663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297797407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3665919 + ... + 3666272.

It is an arithmetic number, because the mean of its divisors is an integer number (219965760).

Almost surely, 2^1297797807 is an apocalyptic number.

1297797807 is a deficient number, since it is larger than the sum of its proper divisors (461928273).

1297797807 is an equidigital number, since it uses as much as digits as its factorization.

1297797807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332253.

The product of its (nonzero) digits is 3111696, while the sum is 57.

The square root of 1297797807 is about 36024.9608882508. The cubic root of 1297797807 is about 1090.7762635241.

The spelling of 1297797807 in words is "one billion, two hundred ninety-seven million, seven hundred ninety-seven thousand, eight hundred seven".