1423503209 has 2 divisors, whose sum is σ = 1423503210. Its totient is φ = 1423503208.

The previous prime is 1423503197. The next prime is 1423503233. The reversal of 1423503209 is 9023053241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160901184 + 262602025 = 34072^2 + 16205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423503209 - 2⁸ = 1423502953 is a prime.

It is a super-2 number, since 2×1423503209² = 4052722772066595362, which contains 22 as substring.

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 (1423503299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711751604 + 711751605.

It is an arithmetic number, because the mean of its divisors is an integer number (711751605).

Almost surely, 2^1423503209 is an apocalyptic number.

It is an amenable number.

1423503209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423503209 is an equidigital number, since it uses as much as digits as its factorization.

1423503209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1423503209 is about 37729.3414864347. The cubic root of 1423503209 is about 1124.9144189055.

The spelling of 1423503209 in words is "one billion, four hundred twenty-three million, five hundred three thousand, two hundred nine".