423661597 has 2 divisors, whose sum is σ = 423661598. Its totient is φ = 423661596.

The previous prime is 423661577. The next prime is 423661621. The reversal of 423661597 is 795166324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284563161 + 139098436 = 16869^2 + 11794^2 .

It is a cyclic number.

It is not a de Polignac number, because 423661597 - 2²³ = 415272989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423661547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211830798 + 211830799.

It is an arithmetic number, because the mean of its divisors is an integer number (211830799).

Almost surely, 2^423661597 is an apocalyptic number.

It is an amenable number.

423661597 is a deficient number, since it is larger than the sum of its proper divisors (1).

423661597 is an equidigital number, since it uses as much as digits as its factorization.

423661597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 423661597 is about 20583.0414905086. The cubic root of 423661597 is about 751.0572331254.

The spelling of 423661597 in words is "four hundred twenty-three million, six hundred sixty-one thousand, five hundred ninety-seven".