47165978 has 8 divisors (see below), whose sum is σ = 70783200. Its totient is φ = 23571580.

The previous prime is 47165971. The next prime is 47165981. The reversal of 47165978 is 87956174.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47165971) 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, 1073 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (8847900).

Almost surely, 2^47165978 is an apocalyptic number.

47165978 is a deficient number, since it is larger than the sum of its proper divisors (23617222).

47165978 is a wasteful number, since it uses less digits than its factorization.

47165978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11412.

The product of its digits is 423360, while the sum is 47.

The square root of 47165978 is about 6867.7491218011. The cubic root of 47165978 is about 361.3069215031.

The spelling of 47165978 in words is "forty-seven million, one hundred sixty-five thousand, nine hundred seventy-eight".