423943699 has 2 divisors, whose sum is σ = 423943700. Its totient is φ = 423943698.

The previous prime is 423943687. The next prime is 423943787. The reversal of 423943699 is 996349324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423943699 - 2⁹ = 423943187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423943679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211971849 + 211971850.

It is an arithmetic number, because the mean of its divisors is an integer number (211971850).

Almost surely, 2^423943699 is an apocalyptic number.

423943699 is a deficient number, since it is larger than the sum of its proper divisors (1).

423943699 is an equidigital number, since it uses as much as digits as its factorization.

423943699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 49.

The square root of 423943699 is about 20589.8931274545. The cubic root of 423943699 is about 751.2238973842.

Subtracting 423943699 from its reverse (996349324), we obtain a square (572405625 = 23925²).

The spelling of 423943699 in words is "four hundred twenty-three million, nine hundred forty-three thousand, six hundred ninety-nine".