47185942 has 4 divisors (see below), whose sum is σ = 70778916. Its totient is φ = 23592970.

The previous prime is 47185907. The next prime is 47185967. The reversal of 47185942 is 24958174.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 47185895 and 47185904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11796484 + ... + 11796487.

It is an arithmetic number, because the mean of its divisors is an integer number (17694729).

Almost surely, 2^47185942 is an apocalyptic number.

47185942 is a deficient number, since it is larger than the sum of its proper divisors (23592974).

47185942 is a wasteful number, since it uses less digits than its factorization.

47185942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23592973.

The product of its digits is 80640, while the sum is 40.

The square root of 47185942 is about 6869.2024282299. The cubic root of 47185942 is about 361.3578912502.

The spelling of 47185942 in words is "forty-seven million, one hundred eighty-five thousand, nine hundred forty-two".