47138577 has 4 divisors (see below), whose sum is σ = 62851440. Its totient is φ = 31425716.

The previous prime is 47138573. The next prime is 47138579. The reversal of 47138577 is 77583174.

It is a happy number.

47138577 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47138577 - 2² = 47138573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47138573) 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, 7856427 + ... + 7856432.

It is an arithmetic number, because the mean of its divisors is an integer number (15712860).

Almost surely, 2^47138577 is an apocalyptic number.

It is an amenable number.

47138577 is a deficient number, since it is larger than the sum of its proper divisors (15712863).

47138577 is a wasteful number, since it uses less digits than its factorization.

47138577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15712862.

The product of its digits is 164640, while the sum is 42.

The square root of 47138577 is about 6865.7539280111. The cubic root of 47138577 is about 361.2369410556.

The spelling of 47138577 in words is "forty-seven million, one hundred thirty-eight thousand, five hundred seventy-seven".