1313178249 has 8 divisors (see below), whose sum is σ = 1751072512. Its totient is φ = 875368080.

The previous prime is 1313178221. The next prime is 1313178253. The reversal of 1313178249 is 9428713131.

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

It is not a de Polignac number, because 1313178249 - 2¹² = 1313174153 is a prime.

It is a super-2 number, since 2×1313178249² = 3448874227293412002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313178149) 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, 45384 + ... + 68454.

It is an arithmetic number, because the mean of its divisors is an integer number (218884064).

Almost surely, 2^1313178249 is an apocalyptic number.

It is an amenable number.

1313178249 is a deficient number, since it is larger than the sum of its proper divisors (437894263).

1313178249 is a wasteful number, since it uses less digits than its factorization.

1313178249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42047.

The product of its digits is 36288, while the sum is 39.

The square root of 1313178249 is about 36237.8013819823. The cubic root of 1313178249 is about 1095.0683496044.

The spelling of 1313178249 in words is "one billion, three hundred thirteen million, one hundred seventy-eight thousand, two hundred forty-nine".