49381813 has 6 divisors (see below), whose sum is σ = 53207714. Its totient is φ = 45559824.

The previous prime is 49381811. The next prime is 49381823. The reversal of 49381813 is 31818394.

49381813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 12439729 + 36942084 = 3527^2 + 6078^2 .

It is not a de Polignac number, because 49381813 - 2¹ = 49381811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49381811) 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 5 ways as a sum of consecutive naturals, for example, 24363 + ... + 26311.

Almost surely, 2^49381813 is an apocalyptic number.

It is an amenable number.

49381813 is a deficient number, since it is larger than the sum of its proper divisors (3825901).

49381813 is an frugal number, since it uses more digits than its factorization.

49381813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911 (or 1962 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 49381813 is about 7027.2194358793. The cubic root of 49381813 is about 366.8785690666.

The spelling of 49381813 in words is "forty-nine million, three hundred eighty-one thousand, eight hundred thirteen".