43687947 has 8 divisors (see below), whose sum is σ = 58766544. Its totient is φ = 28867328.

The previous prime is 43687937. The next prime is 43687967. The reversal of 43687947 is 74978634.

It is a happy number.

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 43687947 - 2⁸ = 43687691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43687896 and 43687905.

It is not an unprimeable number, because it can be changed into a prime (43687937) 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, 64098 + ... + 64775.

It is an arithmetic number, because the mean of its divisors is an integer number (7345818).

Almost surely, 2^43687947 is an apocalyptic number.

43687947 is a deficient number, since it is larger than the sum of its proper divisors (15078597).

43687947 is a wasteful number, since it uses less digits than its factorization.

43687947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128989.

The product of its digits is 1016064, while the sum is 48.

The square root of 43687947 is about 6609.6858473002. The cubic root of 43687947 is about 352.1982650059.

The spelling of 43687947 in words is "forty-three million, six hundred eighty-seven thousand, nine hundred forty-seven".