391616001 has 24 divisors (see below), whose sum is σ = 647002304. Its totient is φ = 223598880.

The previous prime is 391615999. The next prime is 391616003. The reversal of 391616001 is 100616193.

It is an interprime number because it is at equal distance from previous prime (391615999) and next prime (391616003).

It is not a de Polignac number, because 391616001 - 2¹ = 391615999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391616003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132795 + ... + 135711.

Almost surely, 2^391616001 is an apocalyptic number.

It is an amenable number.

391616001 is a deficient number, since it is larger than the sum of its proper divisors (255386303).

391616001 is a wasteful number, since it uses less digits than its factorization.

391616001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061 (or 5058 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 391616001 is about 19789.2900580087. The cubic root of 391616001 is about 731.6220894854.

The spelling of 391616001 in words is "three hundred ninety-one million, six hundred sixteen thousand, one".