47897657 has 4 divisors (see below), whose sum is σ = 49011600. Its totient is φ = 46783716.

The previous prime is 47897639. The next prime is 47897683. The reversal of 47897657 is 75679874.

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 47897657 - 2⁸ = 47897401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47897599 and 47897608.

It is not an unprimeable number, because it can be changed into a prime (47897617) 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, 556907 + ... + 556992.

It is an arithmetic number, because the mean of its divisors is an integer number (12252900).

Almost surely, 2^47897657 is an apocalyptic number.

It is an amenable number.

47897657 is a deficient number, since it is larger than the sum of its proper divisors (1113943).

47897657 is a wasteful number, since it uses less digits than its factorization.

47897657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113942.

The product of its digits is 2963520, while the sum is 53.

The square root of 47897657 is about 6920.8133192566. The cubic root of 47897657 is about 363.1656437039.

The spelling of 47897657 in words is "forty-seven million, eight hundred ninety-seven thousand, six hundred fifty-seven".