47129986 has 8 divisors (see below), whose sum is σ = 70781760. Its totient is φ = 23536068.

The previous prime is 47129981. The next prime is 47129989. The reversal of 47129986 is 68992174.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (47129981) 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, 12366 + ... + 15721.

It is an arithmetic number, because the mean of its divisors is an integer number (8847720).

Almost surely, 2^47129986 is an apocalyptic number.

47129986 is a deficient number, since it is larger than the sum of its proper divisors (23651774).

47129986 is a wasteful number, since it uses less digits than its factorization.

47129986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28928.

The product of its digits is 217728, while the sum is 46.

The square root of 47129986 is about 6865.1282580881. The cubic root of 47129986 is about 361.2149945926.

The spelling of 47129986 in words is "forty-seven million, one hundred twenty-nine thousand, nine hundred eighty-six".