423984917 has 2 divisors, whose sum is σ = 423984918. Its totient is φ = 423984916.

The previous prime is 423984907. The next prime is 423984929. The reversal of 423984917 is 719489324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321449041 + 102535876 = 17929^2 + 10126^2 .

It is a cyclic number.

It is not a de Polignac number, because 423984917 - 2⁸ = 423984661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423984907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211992458 + 211992459.

It is an arithmetic number, because the mean of its divisors is an integer number (211992459).

Almost surely, 2^423984917 is an apocalyptic number.

It is an amenable number.

423984917 is a deficient number, since it is larger than the sum of its proper divisors (1).

423984917 is an equidigital number, since it uses as much as digits as its factorization.

423984917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 423984917 is about 20590.8940311003. The cubic root of 423984917 is about 751.2482425534.

The spelling of 423984917 in words is "four hundred twenty-three million, nine hundred eighty-four thousand, nine hundred seventeen".