49387081 has 4 divisors (see below), whose sum is σ = 49876164. Its totient is φ = 48898000.

The previous prime is 49387067. The next prime is 49387109. The reversal of 49387081 is 18078394.

49387081 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 36542025 + 12845056 = 6045^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 49387081 - 2²¹ = 47289929 is a prime.

It is a super-2 number, since 2×49387081² = 4878167539401122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49387021) 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, 244390 + ... + 244591.

It is an arithmetic number, because the mean of its divisors is an integer number (12469041).

Almost surely, 2^49387081 is an apocalyptic number.

It is an amenable number.

49387081 is a deficient number, since it is larger than the sum of its proper divisors (489083).

49387081 is a wasteful number, since it uses less digits than its factorization.

49387081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489082.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 49387081 is about 7027.5942540815. The cubic root of 49387081 is about 366.8916146763.

The spelling of 49387081 in words is "forty-nine million, three hundred eighty-seven thousand, eighty-one".