423541609 has 2 divisors, whose sum is σ = 423541610. Its totient is φ = 423541608.

The previous prime is 423541579. The next prime is 423541633. The reversal of 423541609 is 906145324.

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., 405901609 + 17640000 = 20147^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 423541609 - 2²⁵ = 389987177 is a prime.

It is not a weakly prime, because it can be changed into another prime (423541669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211770804 + 211770805.

It is an arithmetic number, because the mean of its divisors is an integer number (211770805).

Almost surely, 2^423541609 is an apocalyptic number.

It is an amenable number.

423541609 is a deficient number, since it is larger than the sum of its proper divisors (1).

423541609 is an equidigital number, since it uses as much as digits as its factorization.

423541609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 423541609 is about 20580.1265545186. The cubic root of 423541609 is about 750.9863224702.

The spelling of 423541609 in words is "four hundred twenty-three million, five hundred forty-one thousand, six hundred nine".