47071657 has 8 divisors (see below), whose sum is σ = 49932936. Its totient is φ = 44220672.

The previous prime is 47071631. The next prime is 47071667. The reversal of 47071657 is 75617074.

It can be written as a sum of positive squares in 4 ways, for example, as 1590121 + 45481536 = 1261^2 + 6744^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47071657 - 2¹¹ = 47069609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47071667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8163 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (6241617).

Almost surely, 2^47071657 is an apocalyptic number.

It is an amenable number.

47071657 is a deficient number, since it is larger than the sum of its proper divisors (2861279).

47071657 is a wasteful number, since it uses less digits than its factorization.

47071657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 47071657 is about 6860.8787338066. The cubic root of 47071657 is about 361.0659174755.

It can be divided in two parts, 470 and 71657, that added together give a palindrome (72127).

The spelling of 47071657 in words is "forty-seven million, seventy-one thousand, six hundred fifty-seven".