47234781 has 24 divisors (see below), whose sum is σ = 74902464. Its totient is φ = 28445760.

The previous prime is 47234777. The next prime is 47234783. The reversal of 47234781 is 18743274.

It is a happy number.

It is not a de Polignac number, because 47234781 - 2² = 47234777 is a prime.

It is a super-2 number, since 2×47234781² = 4462249072235922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47234783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15105 + ... + 17961.

It is an arithmetic number, because the mean of its divisors is an integer number (3120936).

Almost surely, 2^47234781 is an apocalyptic number.

47234781 is the 3674-th nonagonal number.

It is an amenable number.

47234781 is a deficient number, since it is larger than the sum of its proper divisors (27667683).

47234781 is a wasteful number, since it uses less digits than its factorization.

47234781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041 (or 3038 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 47234781 is about 6872.7564339208. The cubic root of 47234781 is about 361.4825206909.

It can be divided in two parts, 472 and 34781, that added together give a palindrome (35253).

The spelling of 47234781 in words is "forty-seven million, two hundred thirty-four thousand, seven hundred eighty-one".