391418938897 has 8 divisors (see below), whose sum is σ = 449255828736. Its totient is φ = 334062023712.

The previous prime is 391418938891. The next prime is 391418938943. The reversal of 391418938897 is 798839814193.

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 391418938897 - 2³⁵ = 357059200529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391418938891) 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, 119991913 + ... + 119995174.

It is an arithmetic number, because the mean of its divisors is an integer number (56156978592).

Almost surely, 2^391418938897 is an apocalyptic number.

It is an amenable number.

391418938897 is a deficient number, since it is larger than the sum of its proper divisors (57836889839).

391418938897 is a wasteful number, since it uses less digits than its factorization.

391418938897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239987327.

The product of its digits is 94058496, while the sum is 70.

The spelling of 391418938897 in words is "three hundred ninety-one billion, four hundred eighteen million, nine hundred thirty-eight thousand, eight hundred ninety-seven".