1313791851 has 8 divisors (see below), whose sum is σ = 1753159680. Its totient is φ = 875142632.

The previous prime is 1313791847. The next prime is 1313791861. The reversal of 1313791851 is 1581973131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313791851 - 2² = 1313791847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313791861) 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, 175371 + ... + 182708.

It is an arithmetic number, because the mean of its divisors is an integer number (219144960).

Almost surely, 2^1313791851 is an apocalyptic number.

1313791851 is a deficient number, since it is larger than the sum of its proper divisors (439367829).

1313791851 is a wasteful number, since it uses less digits than its factorization.

1313791851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359305.

The product of its digits is 22680, while the sum is 39.

The square root of 1313791851 is about 36246.2667181049. The cubic root of 1313791851 is about 1095.2388853510.

The spelling of 1313791851 in words is "one billion, three hundred thirteen million, seven hundred ninety-one thousand, eight hundred fifty-one".