391254449 has 4 divisors (see below), whose sum is σ = 408265536. Its totient is φ = 374243364.

The previous prime is 391254433. The next prime is 391254469. The reversal of 391254449 is 944452193.

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 a cyclic number.

It is not a de Polignac number, because 391254449 - 2⁴ = 391254433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391254419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8505509 + ... + 8505554.

It is an arithmetic number, because the mean of its divisors is an integer number (102066384).

Almost surely, 2^391254449 is an apocalyptic number.

It is an amenable number.

391254449 is a deficient number, since it is larger than the sum of its proper divisors (17011087).

391254449 is a wasteful number, since it uses less digits than its factorization.

391254449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17011086.

The product of its digits is 155520, while the sum is 41.

The square root of 391254449 is about 19780.1529063857. The cubic root of 391254449 is about 731.3968681163.

The spelling of 391254449 in words is "three hundred ninety-one million, two hundred fifty-four thousand, four hundred forty-nine".