1297022899 has 4 divisors (see below), whose sum is σ = 1311596280. Its totient is φ = 1282449520.

The previous prime is 1297022887. The next prime is 1297022921. The reversal of 1297022899 is 9982207921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297022899 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297022819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286557 + ... + 7286734.

It is an arithmetic number, because the mean of its divisors is an integer number (327899070).

Almost surely, 2^1297022899 is an apocalyptic number.

1297022899 is a deficient number, since it is larger than the sum of its proper divisors (14573381).

1297022899 is an equidigital number, since it uses as much as digits as its factorization.

1297022899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14573380.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 1297022899 is about 36014.2041283714. The cubic root of 1297022899 is about 1090.5591214455.

It can be divided in two parts, 1297022 and 899, that added together give a palindrome (1297921).

The spelling of 1297022899 in words is "one billion, two hundred ninety-seven million, twenty-two thousand, eight hundred ninety-nine".