423397549 has 8 divisors (see below), whose sum is σ = 443047320. Its totient is φ = 404179776.

The previous prime is 423397543. The next prime is 423397561. The reversal of 423397549 is 945793324.

It can be written as a sum of positive squares in 4 ways, for example, as 53027524 + 370370025 = 7282^2 + 19245^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423397549 - 2⁷ = 423397421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423397499 and 423397508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423397543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105994 + ... + 109915.

It is an arithmetic number, because the mean of its divisors is an integer number (55380915).

Almost surely, 2^423397549 is an apocalyptic number.

It is an amenable number.

423397549 is a deficient number, since it is larger than the sum of its proper divisors (19649771).

423397549 is a wasteful number, since it uses less digits than its factorization.

423397549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215999.

The product of its digits is 816480, while the sum is 46.

The square root of 423397549 is about 20576.6262783771. The cubic root of 423397549 is about 750.9011680205.

The spelling of 423397549 in words is "four hundred twenty-three million, three hundred ninety-seven thousand, five hundred forty-nine".