423115447 has 2 divisors, whose sum is σ = 423115448. Its totient is φ = 423115446.

The previous prime is 423115421. The next prime is 423115453. The reversal of 423115447 is 744511324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423115447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423115417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211557723 + 211557724.

It is an arithmetic number, because the mean of its divisors is an integer number (211557724).

Almost surely, 2^423115447 is an apocalyptic number.

423115447 is a deficient number, since it is larger than the sum of its proper divisors (1).

423115447 is an equidigital number, since it uses as much as digits as its factorization.

423115447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 31.

The square root of 423115447 is about 20569.7702223433. The cubic root of 423115447 is about 750.7343604220.

The spelling of 423115447 in words is "four hundred twenty-three million, one hundred fifteen thousand, four hundred forty-seven".