431987421323 has 2 divisors, whose sum is σ = 431987421324. Its totient is φ = 431987421322.

The previous prime is 431987421287. The next prime is 431987421361. The reversal of 431987421323 is 323124789134.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431987421323 - 2⁸ = 431987421067 is a prime.

It is a super-2 number, since 2×431987421323² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431987421823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215993710661 + 215993710662.

It is an arithmetic number, because the mean of its divisors is an integer number (215993710662).

Almost surely, 2^431987421323 is an apocalyptic number.

431987421323 is a deficient number, since it is larger than the sum of its proper divisors (1).

431987421323 is an equidigital number, since it uses as much as digits as its factorization.

431987421323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The spelling of 431987421323 in words is "four hundred thirty-one billion, nine hundred eighty-seven million, four hundred twenty-one thousand, three hundred twenty-three".