47817487 has 4 divisors (see below), whose sum is σ = 48065440. Its totient is φ = 47569536.

The previous prime is 47817463. The next prime is 47817493. The reversal of 47817487 is 78471874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47817487 - 2⁷ = 47817359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47817457) 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, 123687 + ... + 124072.

It is an arithmetic number, because the mean of its divisors is an integer number (12016360).

Almost surely, 2^47817487 is an apocalyptic number.

47817487 is a deficient number, since it is larger than the sum of its proper divisors (247953).

47817487 is a wasteful number, since it uses less digits than its factorization.

47817487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247952.

The product of its digits is 351232, while the sum is 46.

The square root of 47817487 is about 6915.0189442980. The cubic root of 47817487 is about 362.9629111097.

The spelling of 47817487 in words is "forty-seven million, eight hundred seventeen thousand, four hundred eighty-seven".