47997257 has 8 divisors (see below), whose sum is σ = 59840832. Its totient is φ = 37400400.

The previous prime is 47997253. The next prime is 47997289. The reversal of 47997257 is 75279974.

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

It is a cyclic number.

It is not a de Polignac number, because 47997257 - 2² = 47997253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47997253) 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, 311594 + ... + 311747.

It is an arithmetic number, because the mean of its divisors is an integer number (7480104).

Almost surely, 2^47997257 is an apocalyptic number.

It is an amenable number.

47997257 is a deficient number, since it is larger than the sum of its proper divisors (11843575).

47997257 is a wasteful number, since it uses less digits than its factorization.

47997257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623359.

The product of its digits is 1111320, while the sum is 50.

The square root of 47997257 is about 6928.0052684737. The cubic root of 47997257 is about 363.4171957099.

The spelling of 47997257 in words is "forty-seven million, nine hundred ninety-seven thousand, two hundred fifty-seven".