47057405 has 4 divisors (see below), whose sum is σ = 56468892. Its totient is φ = 37645920.

The previous prime is 47057399. The next prime is 47057407. The reversal of 47057405 is 50475074.

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 15100996 + 31956409 = 3886^2 + 5653^2 .

It is not a de Polignac number, because 47057405 - 2⁶ = 47057341 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 (47057407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705736 + ... + 4705745.

It is an arithmetic number, because the mean of its divisors is an integer number (14117223).

Almost surely, 2^47057405 is an apocalyptic number.

It is an amenable number.

47057405 is a deficient number, since it is larger than the sum of its proper divisors (9411487).

47057405 is an equidigital number, since it uses as much as digits as its factorization.

47057405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9411486.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 47057405 is about 6859.8400127117. The cubic root of 47057405 is about 361.0294735287.

It can be divided in two parts, 470 and 57405, that added together give a palindrome (57875).

The spelling of 47057405 in words is "forty-seven million, fifty-seven thousand, four hundred five".