47977869 has 16 divisors (see below), whose sum is σ = 67492800. Its totient is φ = 30231936.

The previous prime is 47977843. The next prime is 47977873. The reversal of 47977869 is 96877974.

47977869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47977869 - 2⁸ = 47977613 is a prime.

It is a super-2 number, since 2×47977869² = 4603751827562322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47977819) 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, 36577 + ... + 37865.

It is an arithmetic number, because the mean of its divisors is an integer number (4218300).

Almost surely, 2^47977869 is an apocalyptic number.

It is an amenable number.

47977869 is a deficient number, since it is larger than the sum of its proper divisors (19514931).

47977869 is a wasteful number, since it uses less digits than its factorization.

47977869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its digits is 5334336, while the sum is 57.

The square root of 47977869 is about 6926.6058787836. The cubic root of 47977869 is about 363.3682562360.

The spelling of 47977869 in words is "forty-seven million, nine hundred seventy-seven thousand, eight hundred sixty-nine".