1423763921 has 2 divisors, whose sum is σ = 1423763922. Its totient is φ = 1423763920.

The previous prime is 1423763911. The next prime is 1423763977. The reversal of 1423763921 is 1293673241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381980625 + 41783296 = 37175^2 + 6464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423763921 - 2¹⁴ = 1423747537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1423763911) 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, 711881960 + 711881961.

It is an arithmetic number, because the mean of its divisors is an integer number (711881961).

Almost surely, 2^1423763921 is an apocalyptic number.

It is an amenable number.

1423763921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423763921 is an equidigital number, since it uses as much as digits as its factorization.

1423763921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 1423763921 is about 37732.7963580756. The cubic root of 1423763921 is about 1124.9830900504.

The spelling of 1423763921 in words is "one billion, four hundred twenty-three million, seven hundred sixty-three thousand, nine hundred twenty-one".