431970397 has 4 divisors (see below), whose sum is σ = 432317500. Its totient is φ = 431623296.

The previous prime is 431970359. The next prime is 431970403. The reversal of 431970397 is 793079134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138156516 + 293813881 = 11754^2 + 17141^2 .

It is a cyclic number.

It is not a de Polignac number, because 431970397 - 2⁷ = 431970269 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 (431970347) 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, 171678 + ... + 174175.

It is an arithmetic number, because the mean of its divisors is an integer number (108079375).

Almost surely, 2^431970397 is an apocalyptic number.

It is an amenable number.

431970397 is a deficient number, since it is larger than the sum of its proper divisors (347103).

431970397 is a wasteful number, since it uses less digits than its factorization.

431970397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347102.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 431970397 is about 20783.8975411254. The cubic root of 431970397 is about 755.9353622078.

The spelling of 431970397 in words is "four hundred thirty-one million, nine hundred seventy thousand, three hundred ninety-seven".