45423999 has 6 divisors (see below), whose sum is σ = 65612456. Its totient is φ = 30282660.

The previous prime is 45423997. The next prime is 45424007. The reversal of 45423999 is 99932454.

It is a happy number.

It is not a de Polignac number, because 45423999 - 2¹ = 45423997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45423997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2523547 + ... + 2523564.

Almost surely, 2^45423999 is an apocalyptic number.

45423999 is a deficient number, since it is larger than the sum of its proper divisors (20188457).

45423999 is a wasteful number, since it uses less digits than its factorization.

45423999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047117 (or 5047114 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 45423999 is about 6739.7328582074. The cubic root of 45423999 is about 356.8029654440.

The spelling of 45423999 in words is "forty-five million, four hundred twenty-three thousand, nine hundred ninety-nine".