47321977 has 4 divisors (see below), whose sum is σ = 47336356. Its totient is φ = 47307600.

The previous prime is 47321941. The next prime is 47321983. The reversal of 47321977 is 77912374.

47321977 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77912374 = 2 ⋅38956187.

It can be written as a sum of positive squares in 2 ways, for example, as 14017536 + 33304441 = 3744^2 + 5771^2 .

It is a cyclic number.

It is not a de Polignac number, because 47321977 - 2¹⁹ = 46797689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47321777) 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, 463 + ... + 9739.

It is an arithmetic number, because the mean of its divisors is an integer number (11834089).

Almost surely, 2^47321977 is an apocalyptic number.

It is an amenable number.

47321977 is a deficient number, since it is larger than the sum of its proper divisors (14379).

47321977 is an equidigital number, since it uses as much as digits as its factorization.

47321977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14378.

The product of its digits is 74088, while the sum is 40.

The square root of 47321977 is about 6879.0971064523. The cubic root of 47321977 is about 361.7048177196.

The spelling of 47321977 in words is "forty-seven million, three hundred twenty-one thousand, nine hundred seventy-seven".