423927769 has 2 divisors, whose sum is σ = 423927770. Its totient is φ = 423927768.

The previous prime is 423927719. The next prime is 423927773. The reversal of 423927769 is 967729324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399800025 + 24127744 = 19995^2 + 4912^2 .

It is a cyclic number.

It is not a de Polignac number, because 423927769 - 2⁷ = 423927641 is a prime.

It is a super-2 number, since 2×423927769² = 359429506658634722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423927719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211963884 + 211963885.

It is an arithmetic number, because the mean of its divisors is an integer number (211963885).

Almost surely, 2^423927769 is an apocalyptic number.

It is an amenable number.

423927769 is a deficient number, since it is larger than the sum of its proper divisors (1).

423927769 is an equidigital number, since it uses as much as digits as its factorization.

423927769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The square root of 423927769 is about 20589.5062835416. The cubic root of 423927769 is about 751.2144880007.

The spelling of 423927769 in words is "four hundred twenty-three million, nine hundred twenty-seven thousand, seven hundred sixty-nine".