49509621 has 24 divisors (see below), whose sum is σ = 81918720. Its totient is φ = 28226016.

The previous prime is 49509619. The next prime is 49509623. The reversal of 49509621 is 12690594.

It is an interprime number because it is at equal distance from previous prime (49509619) and next prime (49509623).

It is not a de Polignac number, because 49509621 - 2¹ = 49509619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49509623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44751 + ... + 45843.

It is an arithmetic number, because the mean of its divisors is an integer number (3413280).

Almost surely, 2^49509621 is an apocalyptic number.

It is an amenable number.

49509621 is a deficient number, since it is larger than the sum of its proper divisors (32409099).

49509621 is a wasteful number, since it uses less digits than its factorization.

49509621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 49509621 is about 7036.3073412124. The cubic root of 49509621 is about 367.1948097932.

The spelling of 49509621 in words is "forty-nine million, five hundred nine thousand, six hundred twenty-one".