47394681 has 4 divisors (see below), whose sum is σ = 63192912. Its totient is φ = 31596452.

The previous prime is 47394673. The next prime is 47394703. The reversal of 47394681 is 18649374.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47394681 - 2³ = 47394673 is a prime.

It is a super-2 number, since 2×47394681² = 4492511574183522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47394601) 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, 7899111 + ... + 7899116.

It is an arithmetic number, because the mean of its divisors is an integer number (15798228).

Almost surely, 2^47394681 is an apocalyptic number.

It is an amenable number.

47394681 is a deficient number, since it is larger than the sum of its proper divisors (15798231).

47394681 is a wasteful number, since it uses less digits than its factorization.

47394681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798230.

The product of its digits is 145152, while the sum is 42.

The square root of 47394681 is about 6884.3794927357. The cubic root of 47394681 is about 361.8899602455.

The spelling of 47394681 in words is "forty-seven million, three hundred ninety-four thousand, six hundred eighty-one".