45999909 has 24 divisors (see below), whose sum is σ = 72078552. Its totient is φ = 28154880.

The previous prime is 45999907. The next prime is 45999923. The reversal of 45999909 is 90999954.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 396900 + 45603009 = 630^2 + 6753^2 .

It is not a de Polignac number, because 45999909 - 2¹ = 45999907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45999907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2607 + ... + 9939.

It is an arithmetic number, because the mean of its divisors is an integer number (3003273).

Almost surely, 2^45999909 is an apocalyptic number.

It is an amenable number.

45999909 is a deficient number, since it is larger than the sum of its proper divisors (26078643).

45999909 is a wasteful number, since it uses less digits than its factorization.

45999909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397 (or 7394 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 45999909 is about 6782.3232745129. The cubic root of 45999909 is about 358.3045508280.

The spelling of 45999909 in words is "forty-five million, nine hundred ninety-nine thousand, nine hundred nine".