391678001 has 16 divisors (see below), whose sum is σ = 464244480. Its totient is φ = 325758720.

The previous prime is 391677983. The next prime is 391678009. The reversal of 391678001 is 100876193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391678001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391678009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4040 + ... + 28278.

It is an arithmetic number, because the mean of its divisors is an integer number (29015280).

Almost surely, 2^391678001 is an apocalyptic number.

It is an amenable number.

391678001 is a deficient number, since it is larger than the sum of its proper divisors (72566479).

391678001 is a wasteful number, since it uses less digits than its factorization.

391678001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24376.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 391678001 is about 19790.8564999092. The cubic root of 391678001 is about 731.6606971826.

The spelling of 391678001 in words is "three hundred ninety-one million, six hundred seventy-eight thousand, one".