1298299913 has 4 divisors (see below), whose sum is σ = 1298766228. Its totient is φ = 1297833600.

The previous prime is 1298299909. The next prime is 1298299921. The reversal of 1298299913 is 3199928921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1006983289 + 291316624 = 31733^2 + 17068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298299913 - 2² = 1298299909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1298299943) 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, 228956 + ... + 234557.

It is an arithmetic number, because the mean of its divisors is an integer number (324691557).

Almost surely, 2^1298299913 is an apocalyptic number.

It is an amenable number.

1298299913 is a deficient number, since it is larger than the sum of its proper divisors (466315).

1298299913 is an equidigital number, since it uses as much as digits as its factorization.

1298299913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466314.

The product of its digits is 629856, while the sum is 53.

The square root of 1298299913 is about 36031.9290768618. The cubic root of 1298299913 is about 1090.9169158115.

The spelling of 1298299913 in words is "one billion, two hundred ninety-eight million, two hundred ninety-nine thousand, nine hundred thirteen".