47178994 has 4 divisors (see below), whose sum is σ = 70768494. Its totient is φ = 23589496.

The previous prime is 47178991. The next prime is 47179001. The reversal of 47178994 is 49987174.

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

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 17530969 = 5445^2 + 4187^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (47178991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11794747 + ... + 11794750.

Almost surely, 2^47178994 is an apocalyptic number.

47178994 is a deficient number, since it is larger than the sum of its proper divisors (23589500).

47178994 is a wasteful number, since it uses less digits than its factorization.

47178994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23589499.

The product of its digits is 508032, while the sum is 49.

The square root of 47178994 is about 6868.6966740423. The cubic root of 47178994 is about 361.3401540615.

The spelling of 47178994 in words is "forty-seven million, one hundred seventy-eight thousand, nine hundred ninety-four".