47113781 has 16 divisors (see below), whose sum is σ = 55543488. Its totient is φ = 39398400.

The previous prime is 47113771. The next prime is 47113789. The reversal of 47113781 is 18731174.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 47113781 - 2²² = 42919477 is a prime.

It is a super-2 number, since 2×47113781² = 4439416720231922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47113789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81365 + ... + 81941.

It is an arithmetic number, because the mean of its divisors is an integer number (3471468).

Almost surely, 2^47113781 is an apocalyptic number.

It is an amenable number.

47113781 is a deficient number, since it is larger than the sum of its proper divisors (8429707).

47113781 is a wasteful number, since it uses less digits than its factorization.

47113781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its digits is 4704, while the sum is 32.

The square root of 47113781 is about 6863.9479164691. The cubic root of 47113781 is about 361.1735902377.

The spelling of 47113781 in words is "forty-seven million, one hundred thirteen thousand, seven hundred eighty-one".