391359899 has 8 divisors (see below), whose sum is σ = 457670400. Its totient is φ = 327649896.

The previous prime is 391359869. The next prime is 391359919. The reversal of 391359899 is 998953193.

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

It is not a de Polignac number, because 391359899 - 2²⁰ = 390311323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391359809) 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, 649799 + ... + 650400.

It is an arithmetic number, because the mean of its divisors is an integer number (57208800).

Almost surely, 2^391359899 is an apocalyptic number.

391359899 is a deficient number, since it is larger than the sum of its proper divisors (66310501).

391359899 is a wasteful number, since it uses less digits than its factorization.

391359899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300249.

The product of its digits is 2361960, while the sum is 56.

The square root of 391359899 is about 19782.8182774851. The cubic root of 391359899 is about 731.4625703484.

The spelling of 391359899 in words is "three hundred ninety-one million, three hundred fifty-nine thousand, eight hundred ninety-nine".