391484959 has 4 divisors (see below), whose sum is σ = 414513504. Its totient is φ = 368456416.

The previous prime is 391484927. The next prime is 391484963. The reversal of 391484959 is 959484193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 391484959 - 2⁵ = 391484927 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 (391484459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11514247 + ... + 11514280.

It is an arithmetic number, because the mean of its divisors is an integer number (103628376).

Almost surely, 2^391484959 is an apocalyptic number.

391484959 is a deficient number, since it is larger than the sum of its proper divisors (23028545).

391484959 is a wasteful number, since it uses less digits than its factorization.

391484959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23028544.

The product of its digits is 1399680, while the sum is 52.

The square root of 391484959 is about 19785.9788486696. The cubic root of 391484959 is about 731.5404755938.

The spelling of 391484959 in words is "three hundred ninety-one million, four hundred eighty-four thousand, nine hundred fifty-nine".