49042009 has 9 divisors (see below), whose sum is σ = 50446207. Its totient is φ = 47676424.

The previous prime is 49041989. The next prime is 49042033. The reversal of 49042009 is 90024094.

The square root of 49042009 is 7003.

It is a perfect power (a square), and thus also a powerful number.

49042009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5745609 + 43296400 = 2397^2 + 6580^2 .

It is not a de Polignac number, because 49042009 - 2⁵ = 49041977 is a prime.

It is a super-5 number, since 5×49042009⁵ (a number of 40 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49042069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 329067 + ... + 329215.

Almost surely, 2^49042009 is an apocalyptic number.

49042009 is the 7003-rd square number.

49042009 is the 3502-nd centered octagonal number.

It is an amenable number.

49042009 is a deficient number, since it is larger than the sum of its proper divisors (1404198).

49042009 is an frugal number, since it uses more digits than its factorization.

49042009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The cubic root of 49042009 is about 366.0351151275.

The spelling of 49042009 in words is "forty-nine million, forty-two thousand, nine".