431538449 has 4 divisors (see below), whose sum is σ = 438852720. Its totient is φ = 424224180.

The previous prime is 431538439. The next prime is 431538451. The reversal of 431538449 is 944835134.

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 a cyclic number.

It is not a de Polignac number, because 431538449 - 2⁴ = 431538433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (431538409) 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, 3657047 + ... + 3657164.

It is an arithmetic number, because the mean of its divisors is an integer number (109713180).

Almost surely, 2^431538449 is an apocalyptic number.

It is an amenable number.

431538449 is a deficient number, since it is larger than the sum of its proper divisors (7314271).

431538449 is an equidigital number, since it uses as much as digits as its factorization.

431538449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314270.

The product of its digits is 207360, while the sum is 41.

The square root of 431538449 is about 20773.5035321440. The cubic root of 431538449 is about 755.6833127877.

The spelling of 431538449 in words is "four hundred thirty-one million, five hundred thirty-eight thousand, four hundred forty-nine".