1423931891 has 2 divisors, whose sum is σ = 1423931892. Its totient is φ = 1423931890.

The previous prime is 1423931833. The next prime is 1423931893. The reversal of 1423931891 is 1981393241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1423931891 - 2⁶ = 1423931827 is a prime.

Together with 1423931893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1423931893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711965945 + 711965946.

It is an arithmetic number, because the mean of its divisors is an integer number (711965946).

Almost surely, 2^1423931891 is an apocalyptic number.

1423931891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423931891 is an equidigital number, since it uses as much as digits as its factorization.

1423931891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 1423931891 is about 37735.0220749902. The cubic root of 1423931891 is about 1125.0273286530.

The spelling of 1423931891 in words is "one billion, four hundred twenty-three million, nine hundred thirty-one thousand, eight hundred ninety-one".