1297745913 has 8 divisors (see below), whose sum is σ = 1731790368. Its totient is φ = 864432704.

The previous prime is 1297745909. The next prime is 1297745921. The reversal of 1297745913 is 3195477921.

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 1297745913 - 2² = 1297745909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1297744913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178656 + ... + 185777.

It is an arithmetic number, because the mean of its divisors is an integer number (216473796).

Almost surely, 2^1297745913 is an apocalyptic number.

It is an amenable number.

1297745913 is a deficient number, since it is larger than the sum of its proper divisors (434044455).

1297745913 is a wasteful number, since it uses less digits than its factorization.

1297745913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365623.

The product of its digits is 476280, while the sum is 48.

The square root of 1297745913 is about 36024.2406304422. The cubic root of 1297745913 is about 1090.7617246652.

The spelling of 1297745913 in words is "one billion, two hundred ninety-seven million, seven hundred forty-five thousand, nine hundred thirteen".