423379391 has 2 divisors, whose sum is σ = 423379392. Its totient is φ = 423379390.

The previous prime is 423379379. The next prime is 423379393. The reversal of 423379391 is 193973324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423379391 - 2²⁶ = 356270527 is a prime.

Together with 423379393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423379393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211689695 + 211689696.

It is an arithmetic number, because the mean of its divisors is an integer number (211689696).

Almost surely, 2^423379391 is an apocalyptic number.

423379391 is a deficient number, since it is larger than the sum of its proper divisors (1).

423379391 is an equidigital number, since it uses as much as digits as its factorization.

423379391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 41.

The square root of 423379391 is about 20576.1850448522. The cubic root of 423379391 is about 750.8904333824.

The spelling of 423379391 in words is "four hundred twenty-three million, three hundred seventy-nine thousand, three hundred ninety-one".