45542009 has 2 divisors, whose sum is σ = 45542010. Its totient is φ = 45542008.

The previous prime is 45541981. The next prime is 45542059. The reversal of 45542009 is 90024554.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 11202409 = 5860^2 + 3347^2 .

It is a cyclic number.

It is not a de Polignac number, because 45542009 - 2¹² = 45537913 is a prime.

It is not a weakly prime, because it can be changed into another prime (45542059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22771004 + 22771005.

It is an arithmetic number, because the mean of its divisors is an integer number (22771005).

Almost surely, 2^45542009 is an apocalyptic number.

It is an amenable number.

45542009 is a deficient number, since it is larger than the sum of its proper divisors (1).

45542009 is an equidigital number, since it uses as much as digits as its factorization.

45542009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 45542009 is about 6748.4819774524. The cubic root of 45542009 is about 357.1116855613. Note that the first 3 decimals are identical.

The spelling of 45542009 in words is "forty-five million, five hundred forty-two thousand, nine".