47813287 has 4 divisors (see below), whose sum is σ = 49105576. Its totient is φ = 46521000.

The previous prime is 47813273. The next prime is 47813303. The reversal of 47813287 is 78231874.

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 47813287 - 2¹⁹ = 47288999 is a prime.

It is a super-2 number, since 2×47813287² = 4572220827488738, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47813267) 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, 646089 + ... + 646162.

It is an arithmetic number, because the mean of its divisors is an integer number (12276394).

Almost surely, 2^47813287 is an apocalyptic number.

47813287 is a deficient number, since it is larger than the sum of its proper divisors (1292289).

47813287 is a wasteful number, since it uses less digits than its factorization.

47813287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292288.

The product of its digits is 75264, while the sum is 40.

The square root of 47813287 is about 6914.7152508256. The cubic root of 47813287 is about 362.9522839733.

The spelling of 47813287 in words is "forty-seven million, eight hundred thirteen thousand, two hundred eighty-seven".