431002123 has 4 divisors (see below), whose sum is σ = 431428608. Its totient is φ = 430575640.

The previous prime is 431002111. The next prime is 431002133. The reversal of 431002123 is 321200134.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321200134 = 2 ⋅160600067.

It is a cyclic number.

It is not a de Polignac number, because 431002123 - 2⁹ = 431001611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431002097 and 431002106.

It is not an unprimeable number, because it can be changed into a prime (431002133) 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, 211723 + ... + 213748.

It is an arithmetic number, because the mean of its divisors is an integer number (107857152).

Almost surely, 2^431002123 is an apocalyptic number.

431002123 is a deficient number, since it is larger than the sum of its proper divisors (426485).

431002123 is a wasteful number, since it uses less digits than its factorization.

431002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426484.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 431002123 is about 20760.5906226196. The cubic root of 431002123 is about 755.3701227519.

Adding to 431002123 its reverse (321200134), we get a palindrome (752202257).

The spelling of 431002123 in words is "four hundred thirty-one million, two thousand, one hundred twenty-three".