49121813 has 16 divisors (see below), whose sum is σ = 56560896. Its totient is φ = 42303360.

The previous prime is 49121801. The next prime is 49121827. The reversal of 49121813 is 31812194.

49121813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 49121813 - 2⁶ = 49121749 is a prime.

It is a super-3 number, since 3×49121813³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49121893) 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 15 ways as a sum of consecutive naturals, for example, 10256 + ... + 14262.

It is an arithmetic number, because the mean of its divisors is an integer number (3535056).

Almost surely, 2^49121813 is an apocalyptic number.

It is an amenable number.

49121813 is a deficient number, since it is larger than the sum of its proper divisors (7439083).

49121813 is a wasteful number, since it uses less digits than its factorization.

49121813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084.

The product of its digits is 1728, while the sum is 29.

The square root of 49121813 is about 7008.6955276999. The cubic root of 49121813 is about 366.2335520498.

The spelling of 49121813 in words is "forty-nine million, one hundred twenty-one thousand, eight hundred thirteen".