313129391 has 8 divisors (see below), whose sum is σ = 320956464. Its totient is φ = 305395200.

The previous prime is 313129381. The next prime is 313129403. The reversal of 313129391 is 193921313.

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 313129391 - 2¹⁰ = 313128367 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 (313129361) 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, 16370 + ... + 29903.

It is an arithmetic number, because the mean of its divisors is an integer number (40119558).

Almost surely, 2^313129391 is an apocalyptic number.

313129391 is a deficient number, since it is larger than the sum of its proper divisors (7827073).

313129391 is a wasteful number, since it uses less digits than its factorization.

313129391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46441.

The product of its digits is 4374, while the sum is 32.

The square root of 313129391 is about 17695.4624409762. The cubic root of 313129391 is about 679.0596799739.

The spelling of 313129391 in words is "three hundred thirteen million, one hundred twenty-nine thousand, three hundred ninety-one".