391494147 has 8 divisors (see below), whose sum is σ = 569446080. Its totient is φ = 237269160.

The previous prime is 391494127. The next prime is 391494149. The reversal of 391494147 is 741494193.

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

It is not a de Polignac number, because 391494147 - 2⁶ = 391494083 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 391494099 and 391494108.

It is not an unprimeable number, because it can be changed into a prime (391494149) 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, 5931697 + ... + 5931762.

It is an arithmetic number, because the mean of its divisors is an integer number (71180760).

Almost surely, 2^391494147 is an apocalyptic number.

391494147 is a deficient number, since it is larger than the sum of its proper divisors (177951933).

391494147 is a wasteful number, since it uses less digits than its factorization.

391494147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11863473.

The product of its digits is 108864, while the sum is 42.

The square root of 391494147 is about 19786.2110319283. The cubic root of 391494147 is about 731.5461985394.

The spelling of 391494147 in words is "three hundred ninety-one million, four hundred ninety-four thousand, one hundred forty-seven".