439231397 has 16 divisors (see below), whose sum is σ = 509965632. Its totient is φ = 373873920.

The previous prime is 439231357. The next prime is 439231409. The reversal of 439231397 is 793132934.

It is a cyclic number.

It is not a de Polignac number, because 439231397 - 2⁶ = 439231333 is a prime.

It is a super-2 number, since 2×439231397² = 385848440221143218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439231307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30878 + ... + 42800.

It is an arithmetic number, because the mean of its divisors is an integer number (31872852).

Almost surely, 2^439231397 is an apocalyptic number.

It is an amenable number.

439231397 is a deficient number, since it is larger than the sum of its proper divisors (70734235).

439231397 is a wasteful number, since it uses less digits than its factorization.

439231397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12148.

The product of its digits is 122472, while the sum is 41.

The square root of 439231397 is about 20957.8481004134. The cubic root of 439231397 is about 760.1473611991.

The spelling of 439231397 in words is "four hundred thirty-nine million, two hundred thirty-one thousand, three hundred ninety-seven".