391869401 has 8 divisors (see below), whose sum is σ = 488564544. Its totient is φ = 305352720.

The previous prime is 391869389. The next prime is 391869437. The reversal of 391869401 is 104968193.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391869401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391869451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544530 + ... + 2544683.

It is an arithmetic number, because the mean of its divisors is an integer number (61070568).

Almost surely, 2^391869401 is an apocalyptic number.

It is an amenable number.

391869401 is a deficient number, since it is larger than the sum of its proper divisors (96695143).

391869401 is a wasteful number, since it uses less digits than its factorization.

391869401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089231.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 391869401 is about 19795.6914756722. The cubic root of 391869401 is about 731.7798571833.

The spelling of 391869401 in words is "three hundred ninety-one million, eight hundred sixty-nine thousand, four hundred one".