1297705399 has 8 divisors (see below), whose sum is σ = 1320824192. Its totient is φ = 1274646240.

The previous prime is 1297705393. The next prime is 1297705417. The reversal of 1297705399 is 9935077921.

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

It is not a de Polignac number, because 1297705399 - 2⁹ = 1297704887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297705393) 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, 30202 + ... + 59224.

It is an arithmetic number, because the mean of its divisors is an integer number (165103024).

Almost surely, 2^1297705399 is an apocalyptic number.

1297705399 is a deficient number, since it is larger than the sum of its proper divisors (23118793).

1297705399 is an equidigital number, since it uses as much as digits as its factorization.

1297705399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29817.

The product of its (nonzero) digits is 1071630, while the sum is 52.

The square root of 1297705399 is about 36023.6783102448. The cubic root of 1297705399 is about 1090.7503738093.

The spelling of 1297705399 in words is "one billion, two hundred ninety-seven million, seven hundred five thousand, three hundred ninety-nine".