391480689 has 8 divisors (see below), whose sum is σ = 522232480. Its totient is φ = 260858016.

The previous prime is 391480673. The next prime is 391480721. The reversal of 391480689 is 986084193.

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

It is not a de Polignac number, because 391480689 - 2⁴ = 391480673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391480619) 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, 24967 + ... + 37500.

It is an arithmetic number, because the mean of its divisors is an integer number (65279060).

Almost surely, 2^391480689 is an apocalyptic number.

It is an amenable number.

391480689 is a deficient number, since it is larger than the sum of its proper divisors (130751791).

391480689 is a wasteful number, since it uses less digits than its factorization.

391480689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64559.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 391480689 is about 19785.8709436810. The cubic root of 391480689 is about 731.5378159010.

The spelling of 391480689 in words is "three hundred ninety-one million, four hundred eighty thousand, six hundred eighty-nine".