49721617 has 8 divisors (see below), whose sum is σ = 57432672. Its totient is φ = 42542400.

The previous prime is 49721611. The next prime is 49721621. The reversal of 49721617 is 71612794.

49721617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49721617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49721611) 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 7 ways as a sum of consecutive naturals, for example, 132759 + ... + 133132.

It is an arithmetic number, because the mean of its divisors is an integer number (7179084).

Almost surely, 2^49721617 is an apocalyptic number.

It is an amenable number.

49721617 is a deficient number, since it is larger than the sum of its proper divisors (7711055).

49721617 is a wasteful number, since it uses less digits than its factorization.

49721617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265919.

The product of its digits is 21168, while the sum is 37.

The square root of 49721617 is about 7051.3556852566. The cubic root of 49721617 is about 367.7181625341.

The spelling of 49721617 in words is "forty-nine million, seven hundred twenty-one thousand, six hundred seventeen".