1423331909 has 2 divisors, whose sum is σ = 1423331910. Its totient is φ = 1423331908.

The previous prime is 1423331893. The next prime is 1423331927. The reversal of 1423331909 is 9091333241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1027202500 + 396129409 = 32050^2 + 19903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423331909 - 2⁴ = 1423331893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423331929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711665954 + 711665955.

It is an arithmetic number, because the mean of its divisors is an integer number (711665955).

Almost surely, 2^1423331909 is an apocalyptic number.

It is an amenable number.

1423331909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423331909 is an equidigital number, since it uses as much as digits as its factorization.

1423331909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 1423331909 is about 37727.0713016529. The cubic root of 1423331909 is about 1124.8692941811.

The spelling of 1423331909 in words is "one billion, four hundred twenty-three million, three hundred thirty-one thousand, nine hundred nine".