431693393 has 8 divisors (see below), whose sum is σ = 469441512. Its totient is φ = 395318016.

The previous prime is 431693377. The next prime is 431693407. The reversal of 431693393 is 393396134.

It can be written as a sum of positive squares in 4 ways, for example, as 187333969 + 244359424 = 13687^2 + 15632^2 .

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 431693393 - 2⁴ = 431693377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431693393.

It is not an unprimeable number, because it can be changed into a prime (431693303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342530 + ... + 343787.

It is an arithmetic number, because the mean of its divisors is an integer number (58680189).

Almost surely, 2^431693393 is an apocalyptic number.

It is an amenable number.

431693393 is a deficient number, since it is larger than the sum of its proper divisors (37748119).

431693393 is a wasteful number, since it uses less digits than its factorization.

431693393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686371.

The product of its digits is 157464, while the sum is 41.

The square root of 431693393 is about 20777.2325635538. The cubic root of 431693393 is about 755.7737447331.

The spelling of 431693393 in words is "four hundred thirty-one million, six hundred ninety-three thousand, three hundred ninety-three".