423403031 has 2 divisors, whose sum is σ = 423403032. Its totient is φ = 423403030.

The previous prime is 423403007. The next prime is 423403039. The reversal of 423403031 is 130304324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423403031 - 2²⁶ = 356294167 is a prime.

It is a super-2 number, since 2×423403031² = 358540253319973922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423402994 and 423403012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423403039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211701515 + 211701516.

It is an arithmetic number, because the mean of its divisors is an integer number (211701516).

Almost surely, 2^423403031 is an apocalyptic number.

423403031 is a deficient number, since it is larger than the sum of its proper divisors (1).

423403031 is an equidigital number, since it uses as much as digits as its factorization.

423403031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 423403031 is about 20576.7594873440. The cubic root of 423403031 is about 750.9044088064.

Adding to 423403031 its reverse (130304324), we get a palindrome (553707355).

The spelling of 423403031 in words is "four hundred twenty-three million, four hundred three thousand, thirty-one".