431370421 has 2 divisors, whose sum is σ = 431370422. Its totient is φ = 431370420.

The previous prime is 431370419. The next prime is 431370437. The reversal of 431370421 is 124073134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411887025 + 19483396 = 20295^2 + 4414^2 .

It is a cyclic number.

It is not a de Polignac number, because 431370421 - 2¹ = 431370419 is a prime.

It is a super-2 number, since 2×431370421² = 372160880227434482, which contains 22 as substring.

Together with 431370419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431370481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215685210 + 215685211.

It is an arithmetic number, because the mean of its divisors is an integer number (215685211).

Almost surely, 2^431370421 is an apocalyptic number.

It is an amenable number.

431370421 is a deficient number, since it is larger than the sum of its proper divisors (1).

431370421 is an equidigital number, since it uses as much as digits as its factorization.

431370421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 431370421 is about 20769.4588518815. The cubic root of 431370421 is about 755.5852199914.

The spelling of 431370421 in words is "four hundred thirty-one million, three hundred seventy thousand, four hundred twenty-one".