439130397 has 4 divisors (see below), whose sum is σ = 585507200. Its totient is φ = 292753596.

The previous prime is 439130389. The next prime is 439130423. The reversal of 439130397 is 793031934.

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 439130397 - 2³ = 439130389 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 (439130897) 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, 73188397 + ... + 73188402.

It is an arithmetic number, because the mean of its divisors is an integer number (146376800).

Almost surely, 2^439130397 is an apocalyptic number.

It is an amenable number.

439130397 is a deficient number, since it is larger than the sum of its proper divisors (146376803).

439130397 is a wasteful number, since it uses less digits than its factorization.

439130397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146376802.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 439130397 is about 20955.4383633462. The cubic root of 439130397 is about 760.0890921641.

The spelling of 439130397 in words is "four hundred thirty-nine million, one hundred thirty thousand, three hundred ninety-seven".