391680601 has 8 divisors (see below), whose sum is σ = 422134664. Its totient is φ = 361272960.

The previous prime is 391680589. The next prime is 391680607. The reversal of 391680601 is 106086193.

It can be written as a sum of positive squares in 4 ways, for example, as 26832400 + 364848201 = 5180^2 + 19101^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 391680601 - 2⁷ = 391680473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391680607) 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, 7045 + ... + 28861.

It is an arithmetic number, because the mean of its divisors is an integer number (52766833).

Almost surely, 2^391680601 is an apocalyptic number.

It is an amenable number.

391680601 is a deficient number, since it is larger than the sum of its proper divisors (30454063).

391680601 is a wasteful number, since it uses less digits than its factorization.

391680601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23211.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 391680601 is about 19790.9221866996. The cubic root of 391680601 is about 731.6623161260.

The spelling of 391680601 in words is "three hundred ninety-one million, six hundred eighty thousand, six hundred one".