49696921 has 4 divisors (see below), whose sum is σ = 49954612. Its totient is φ = 49439232.

The previous prime is 49696919. The next prime is 49696963. The reversal of 49696921 is 12969694.

49696921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31753225 + 17943696 = 5635^2 + 4236^2 .

It is a cyclic number.

It is not a de Polignac number, because 49696921 - 2¹ = 49696919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49696901) 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 3 ways as a sum of consecutive naturals, for example, 128556 + ... + 128941.

It is an arithmetic number, because the mean of its divisors is an integer number (12488653).

Almost surely, 2^49696921 is an apocalyptic number.

It is an amenable number.

49696921 is a deficient number, since it is larger than the sum of its proper divisors (257691).

49696921 is a wasteful number, since it uses less digits than its factorization.

49696921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257690.

The product of its digits is 209952, while the sum is 46.

The square root of 49696921 is about 7049.6043151371. The cubic root of 49696921 is about 367.6572723741.

The spelling of 49696921 in words is "forty-nine million, six hundred ninety-six thousand, nine hundred twenty-one".