45649409 has 4 divisors (see below), whose sum is σ = 49160916. Its totient is φ = 42137904.

The previous prime is 45649399. The next prime is 45649427. The reversal of 45649409 is 90494654.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30283009 + 15366400 = 5503^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 45649409 - 2²⁰ = 44600833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45649459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755734 + ... + 1755759.

It is an arithmetic number, because the mean of its divisors is an integer number (12290229).

Almost surely, 2^45649409 is an apocalyptic number.

It is an amenable number.

45649409 is a deficient number, since it is larger than the sum of its proper divisors (3511507).

45649409 is a wasteful number, since it uses less digits than its factorization.

45649409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511506.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 45649409 is about 6756.4346367000. The cubic root of 45649409 is about 357.3921861795.

The spelling of 45649409 in words is "forty-five million, six hundred forty-nine thousand, four hundred nine".