47117657 has 4 divisors (see below), whose sum is σ = 47149440. Its totient is φ = 47085876.

The previous prime is 47117647. The next prime is 47117671. The reversal of 47117657 is 75671174.

It is a happy number.

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 47117657 - 2¹⁴ = 47101273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47117657.

It is not an unprimeable number, because it can be changed into a prime (47117617) 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, 13553 + ... + 16670.

It is an arithmetic number, because the mean of its divisors is an integer number (11787360).

Almost surely, 2^47117657 is an apocalyptic number.

It is an amenable number.

47117657 is a deficient number, since it is larger than the sum of its proper divisors (31783).

47117657 is a wasteful number, since it uses less digits than its factorization.

47117657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31782.

The product of its digits is 41160, while the sum is 38.

The square root of 47117657 is about 6864.2302554620. The cubic root of 47117657 is about 361.1834944202.

It can be divided in two parts, 47117 and 657, that added together give a palindrome (47774).

The spelling of 47117657 in words is "forty-seven million, one hundred seventeen thousand, six hundred fifty-seven".