47984257 has 4 divisors (see below), whose sum is σ = 48432816. Its totient is φ = 47535700.

The previous prime is 47984219. The next prime is 47984263. The reversal of 47984257 is 75248974.

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 47984257 - 2⁷ = 47984129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47984297) 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, 224119 + ... + 224332.

It is an arithmetic number, because the mean of its divisors is an integer number (12108204).

Almost surely, 2^47984257 is an apocalyptic number.

It is an amenable number.

47984257 is a deficient number, since it is larger than the sum of its proper divisors (448559).

47984257 is a wasteful number, since it uses less digits than its factorization.

47984257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448558.

The product of its digits is 564480, while the sum is 46.

The square root of 47984257 is about 6927.0669839406. The cubic root of 47984257 is about 363.3843823754.

The spelling of 47984257 in words is "forty-seven million, nine hundred eighty-four thousand, two hundred fifty-seven".