423652217 has 2 divisors, whose sum is σ = 423652218. Its totient is φ = 423652216.

The previous prime is 423652171. The next prime is 423652237. The reversal of 423652217 is 712256324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418652521 + 4999696 = 20461^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 423652217 - 2¹⁴ = 423635833 is a prime.

It is not a weakly prime, because it can be changed into another prime (423652237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211826108 + 211826109.

It is an arithmetic number, because the mean of its divisors is an integer number (211826109).

Almost surely, 2^423652217 is an apocalyptic number.

It is an amenable number.

423652217 is a deficient number, since it is larger than the sum of its proper divisors (1).

423652217 is an equidigital number, since it uses as much as digits as its factorization.

423652217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 423652217 is about 20582.8136317657. The cubic root of 423652217 is about 751.0516902039.

The spelling of 423652217 in words is "four hundred twenty-three million, six hundred fifty-two thousand, two hundred seventeen".