431719421 has 4 divisors (see below), whose sum is σ = 493393632. Its totient is φ = 370045212.

The previous prime is 431719411. The next prime is 431719429. The reversal of 431719421 is 124917134.

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 431719421 - 2⁶ = 431719357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431719429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30837095 + ... + 30837108.

It is an arithmetic number, because the mean of its divisors is an integer number (123348408).

Almost surely, 2^431719421 is an apocalyptic number.

It is an amenable number.

431719421 is a deficient number, since it is larger than the sum of its proper divisors (61674211).

431719421 is an equidigital number, since it uses as much as digits as its factorization.

431719421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61674210.

The product of its digits is 6048, while the sum is 32.

The square root of 431719421 is about 20777.8589127946. The cubic root of 431719421 is about 755.7889336643.

The spelling of 431719421 in words is "four hundred thirty-one million, seven hundred nineteen thousand, four hundred twenty-one".