1313201857 has 8 divisors (see below), whose sum is σ = 1433200032. Its totient is φ = 1193306400.

The previous prime is 1313201849. The next prime is 1313201909. The reversal of 1313201857 is 7581023131.

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

It is not a de Polignac number, because 1313201857 - 2³ = 1313201849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313201257) 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, 2398 + ... + 51304.

It is an arithmetic number, because the mean of its divisors is an integer number (179150004).

Almost surely, 2^1313201857 is an apocalyptic number.

It is an amenable number.

1313201857 is a deficient number, since it is larger than the sum of its proper divisors (119998175).

1313201857 is a wasteful number, since it uses less digits than its factorization.

1313201857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51359.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1313201857 is about 36238.1271177195. The cubic root of 1313201857 is about 1095.0749118561.

Adding to 1313201857 its reverse (7581023131), we get a palindrome (8894224988).

The spelling of 1313201857 in words is "one billion, three hundred thirteen million, two hundred one thousand, eight hundred fifty-seven".