423999545 has 8 divisors (see below), whose sum is σ = 509802120. Its totient is φ = 338531200.

The previous prime is 423999529. The next prime is 423999571. The reversal of 423999545 is 545999324.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101042704 + 322956841 = 10052^2 + 17971^2 .

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

It is not a de Polignac number, because 423999545 - 2⁴ = 423999529 is a prime.

It is a super-2 number, since 2×423999545² = 359551228320414050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423999493 and 423999502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80756 + ... + 85845.

It is an arithmetic number, because the mean of its divisors is an integer number (63725265).

Almost surely, 2^423999545 is an apocalyptic number.

It is an amenable number.

423999545 is a deficient number, since it is larger than the sum of its proper divisors (85802575).

423999545 is a wasteful number, since it uses less digits than its factorization.

423999545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167115.

The product of its digits is 1749600, while the sum is 50.

The square root of 423999545 is about 20591.2492335944. The cubic root of 423999545 is about 751.2568821161.

The spelling of 423999545 in words is "four hundred twenty-three million, nine hundred ninety-nine thousand, five hundred forty-five".