49002009 has 20 divisors (see below), whose sum is σ = 76232016. Its totient is φ = 27997032.

The previous prime is 49001903. The next prime is 49002049. The reversal of 49002009 is 90020094.

It is not a de Polignac number, because 49002009 - 2²³ = 40613401 is a prime.

49002009 is a modest number, since divided by 2009 gives 490 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49002009.

It is not an unprimeable number, because it can be changed into a prime (49002049) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3802 + ... + 10604.

Almost surely, 2^49002009 is an apocalyptic number.

49002009 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

49002009 is a deficient number, since it is larger than the sum of its proper divisors (27230007).

49002009 is an frugal number, since it uses more digits than its factorization.

49002009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834 (or 6813 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 49002009 is about 7000.1434985292. The cubic root of 49002009 is about 365.9355719851.

The spelling of 49002009 in words is "forty-nine million, two thousand, nine".