391346099 has 4 divisors (see below), whose sum is σ = 391544064. Its totient is φ = 391148136.

The previous prime is 391346093. The next prime is 391346113. The reversal of 391346099 is 990643193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 391346099 - 2¹⁶ = 391280563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391346093) 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 3 ways as a sum of consecutive naturals, for example, 95987 + ... + 99980.

It is an arithmetic number, because the mean of its divisors is an integer number (97886016).

Almost surely, 2^391346099 is an apocalyptic number.

391346099 is a deficient number, since it is larger than the sum of its proper divisors (197965).

391346099 is a wasteful number, since it uses less digits than its factorization.

391346099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197964.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 391346099 is about 19782.4694868967. The cubic root of 391346099 is about 731.4539727191.

The spelling of 391346099 in words is "three hundred ninety-one million, three hundred forty-six thousand, ninety-nine".