423730409 has 2 divisors, whose sum is σ = 423730410. Its totient is φ = 423730408.

The previous prime is 423730393. The next prime is 423730453. The reversal of 423730409 is 904037324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 350251225 + 73479184 = 18715^2 + 8572^2 .

It is a cyclic number.

It is not a de Polignac number, because 423730409 - 2⁴ = 423730393 is a prime.

It is a super-2 number, since 2×423730409² = 359094919022614562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423730459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211865204 + 211865205.

It is an arithmetic number, because the mean of its divisors is an integer number (211865205).

Almost surely, 2^423730409 is an apocalyptic number.

It is an amenable number.

423730409 is a deficient number, since it is larger than the sum of its proper divisors (1).

423730409 is an equidigital number, since it uses as much as digits as its factorization.

423730409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 423730409 is about 20584.7129928984. The cubic root of 423730409 is about 751.0978936847.

The spelling of 423730409 in words is "four hundred twenty-three million, seven hundred thirty thousand, four hundred nine".