423115391 has 2 divisors, whose sum is σ = 423115392. Its totient is φ = 423115390.

The previous prime is 423115379. The next prime is 423115403. The reversal of 423115391 is 193511324.

It is a balanced prime because it is at equal distance from previous prime (423115379) and next prime (423115403).

It is a cyclic number.

It is not a de Polignac number, because 423115391 - 2⁶ = 423115327 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423115991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211557695 + 211557696.

It is an arithmetic number, because the mean of its divisors is an integer number (211557696).

Almost surely, 2^423115391 is an apocalyptic number.

423115391 is a deficient number, since it is larger than the sum of its proper divisors (1).

423115391 is an equidigital number, since it uses as much as digits as its factorization.

423115391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 423115391 is about 20569.7688611224. The cubic root of 423115391 is about 750.7343273018.

The spelling of 423115391 in words is "four hundred twenty-three million, one hundred fifteen thousand, three hundred ninety-one".