391146994 has 16 divisors (see below), whose sum is σ = 679724928. Its totient is φ = 165337632.

The previous prime is 391146967. The next prime is 391146997. The reversal of 391146994 is 499641193.

It is not an unprimeable number, because it can be changed into a prime (391146997) 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, 190342 + ... + 192385.

It is an arithmetic number, because the mean of its divisors is an integer number (42482808).

Almost surely, 2^391146994 is an apocalyptic number.

391146994 is a deficient number, since it is larger than the sum of its proper divisors (288577934).

391146994 is a wasteful number, since it uses less digits than its factorization.

391146994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382809.

The product of its digits is 209952, while the sum is 46.

The square root of 391146994 is about 19777.4364870678. The cubic root of 391146994 is about 731.3299044932.

It can be divided in two parts, 3911 and 46994, that added together give a palindrome (50905).

The spelling of 391146994 in words is "three hundred ninety-one million, one hundred forty-six thousand, nine hundred ninety-four".