47116981 has 4 divisors (see below), whose sum is σ = 47257132. Its totient is φ = 46976832.

The previous prime is 47116963. The next prime is 47116991. The reversal of 47116981 is 18961174.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15476356 + 31640625 = 3934^2 + 5625^2 .

It is a cyclic number.

It is not a de Polignac number, because 47116981 - 2²¹ = 45019829 is a prime.

It is a super-2 number, since 2×47116981² = 4440019797108722, 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 47116981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47116961) 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, 69570 + ... + 70243.

It is an arithmetic number, because the mean of its divisors is an integer number (11814283).

Almost surely, 2^47116981 is an apocalyptic number.

It is an amenable number.

47116981 is a deficient number, since it is larger than the sum of its proper divisors (140151).

47116981 is a wasteful number, since it uses less digits than its factorization.

47116981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140150.

The product of its digits is 12096, while the sum is 37.

The square root of 47116981 is about 6864.1810145129. The cubic root of 47116981 is about 361.1817671044.

The spelling of 47116981 in words is "forty-seven million, one hundred sixteen thousand, nine hundred eighty-one".