47443681 has 8 divisors (see below), whose sum is σ = 49302720. Its totient is φ = 45599568.

The previous prime is 47443661. The next prime is 47443709. The reversal of 47443681 is 18634474.

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

It is a cyclic number.

It is not a de Polignac number, because 47443681 - 2¹³ = 47435489 is a prime.

It is a super-2 number, since 2×47443681² = 4501805733659522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47443681.

It is not an unprimeable number, because it can be changed into a prime (47443631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980 + ... + 10186.

It is an arithmetic number, because the mean of its divisors is an integer number (6162840).

Almost surely, 2^47443681 is an apocalyptic number.

It is an amenable number.

47443681 is a deficient number, since it is larger than the sum of its proper divisors (1859039).

47443681 is a wasteful number, since it uses less digits than its factorization.

47443681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463.

The product of its digits is 64512, while the sum is 37.

The square root of 47443681 is about 6887.9373545351. The cubic root of 47443681 is about 362.0146331702.

The spelling of 47443681 in words is "forty-seven million, four hundred forty-three thousand, six hundred eighty-one".