391427449 has 8 divisors (see below), whose sum is σ = 448112448. Its totient is φ = 334934160.

The previous prime is 391427447. The next prime is 391427453. The reversal of 391427449 is 944724193.

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 391427449 - 2¹ = 391427447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391427441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43522 + ... + 51739.

It is an arithmetic number, because the mean of its divisors is an integer number (56014056).

Almost surely, 2^391427449 is an apocalyptic number.

It is an amenable number.

391427449 is a deficient number, since it is larger than the sum of its proper divisors (56684999).

391427449 is an equidigital number, since it uses as much as digits as its factorization.

391427449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95855.

The product of its digits is 217728, while the sum is 43.

The square root of 391427449 is about 19784.5254934254. The cubic root of 391427449 is about 731.5046522056.

It can be divided in two parts, 391427 and 449, that added together give a square (391876 = 626²).

The spelling of 391427449 in words is "three hundred ninety-one million, four hundred twenty-seven thousand, four hundred forty-nine".