391361349 has 4 divisors (see below), whose sum is σ = 521815136. Its totient is φ = 260907564.

The previous prime is 391361317. The next prime is 391361387. The reversal of 391361349 is 943163193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 391361349 - 2⁵ = 391361317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391361309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65226889 + ... + 65226894.

It is an arithmetic number, because the mean of its divisors is an integer number (130453784).

Almost surely, 2^391361349 is an apocalyptic number.

It is an amenable number.

391361349 is a deficient number, since it is larger than the sum of its proper divisors (130453787).

391361349 is a wasteful number, since it uses less digits than its factorization.

391361349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130453786.

The product of its digits is 52488, while the sum is 39.

The square root of 391361349 is about 19782.8549254146. The cubic root of 391361349 is about 731.4634737108.

The spelling of 391361349 in words is "three hundred ninety-one million, three hundred sixty-one thousand, three hundred forty-nine".