423511997 has 2 divisors, whose sum is σ = 423511998. Its totient is φ = 423511996.

The previous prime is 423511993. The next prime is 423512021. The reversal of 423511997 is 799115324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308142916 + 115369081 = 17554^2 + 10741^2 .

It is a cyclic number.

It is not a de Polignac number, because 423511997 - 2² = 423511993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423511993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211755998 + 211755999.

It is an arithmetic number, because the mean of its divisors is an integer number (211755999).

Almost surely, 2^423511997 is an apocalyptic number.

It is an amenable number.

423511997 is a deficient number, since it is larger than the sum of its proper divisors (1).

423511997 is an equidigital number, since it uses as much as digits as its factorization.

423511997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 423511997 is about 20579.4071100214. The cubic root of 423511997 is about 750.9688202738.

The spelling of 423511997 in words is "four hundred twenty-three million, five hundred eleven thousand, nine hundred ninety-seven".