391131113 has 8 divisors (see below), whose sum is σ = 393092448. Its totient is φ = 389175264.

The previous prime is 391131101. The next prime is 391131151. The reversal of 391131113 is 311131193.

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 391131113 - 2⁶ = 391131049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (391131163) 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, 222245 + ... + 223997.

It is an arithmetic number, because the mean of its divisors is an integer number (49136556).

Almost surely, 2^391131113 is an apocalyptic number.

It is an amenable number.

391131113 is a deficient number, since it is larger than the sum of its proper divisors (1961335).

391131113 is a wasteful number, since it uses less digits than its factorization.

391131113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743.

The product of its digits is 243, while the sum is 23.

The square root of 391131113 is about 19777.0349901091. The cubic root of 391131113 is about 731.3200067586.

The spelling of 391131113 in words is "three hundred ninety-one million, one hundred thirty-one thousand, one hundred thirteen".