47797657 has 4 divisors (see below), whose sum is σ = 49875840. Its totient is φ = 45719476.

The previous prime is 47797643. The next prime is 47797661. The reversal of 47797657 is 75679774.

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 a de Polignac number, because none of the positive numbers 2^k-47797657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47797667) 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, 1039057 + ... + 1039102.

It is an arithmetic number, because the mean of its divisors is an integer number (12468960).

Almost surely, 2^47797657 is an apocalyptic number.

It is an amenable number.

47797657 is a deficient number, since it is larger than the sum of its proper divisors (2078183).

47797657 is a wasteful number, since it uses less digits than its factorization.

47797657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078182.

The product of its digits is 2593080, while the sum is 52.

The square root of 47797657 is about 6913.5849600623. The cubic root of 47797657 is about 362.9127303763.

The spelling of 47797657 in words is "forty-seven million, seven hundred ninety-seven thousand, six hundred fifty-seven".