391384545 has 16 divisors (see below), whose sum is σ = 627006912. Its totient is φ = 208474560.

The previous prime is 391384519. The next prime is 391384561. The reversal of 391384545 is 545483193.

It is not a de Polignac number, because 391384545 - 2⁷ = 391384417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 391384497 and 391384506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922 + ... + 28251.

It is an arithmetic number, because the mean of its divisors is an integer number (39187932).

Almost surely, 2^391384545 is an apocalyptic number.

It is an amenable number.

391384545 is a deficient number, since it is larger than the sum of its proper divisors (235622367).

391384545 is a wasteful number, since it uses less digits than its factorization.

391384545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32992.

The product of its digits is 259200, while the sum is 42.

The square root of 391384545 is about 19783.4411819582. The cubic root of 391384545 is about 731.4779247133.

The spelling of 391384545 in words is "three hundred ninety-one million, three hundred eighty-four thousand, five hundred forty-five".