1249313399 has 4 divisors (see below), whose sum is σ = 1283078664. Its totient is φ = 1215548136.

The previous prime is 1249313389. The next prime is 1249313407. The reversal of 1249313399 is 9933139421.

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-1249313399 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 (1249313369) 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, 16882577 + ... + 16882650.

It is an arithmetic number, because the mean of its divisors is an integer number (320769666).

Almost surely, 2^1249313399 is an apocalyptic number.

1249313399 is a deficient number, since it is larger than the sum of its proper divisors (33765265).

1249313399 is an equidigital number, since it uses as much as digits as its factorization.

1249313399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33765264.

The product of its digits is 157464, while the sum is 44.

The square root of 1249313399 is about 35345.6277211199. The cubic root of 1249313399 is about 1077.0200772914.

The spelling of 1249313399 in words is "one billion, two hundred forty-nine million, three hundred thirteen thousand, three hundred ninety-nine".