47793281 has 4 divisors (see below), whose sum is σ = 47956692. Its totient is φ = 47629872.

The previous prime is 47793259. The next prime is 47793283. The reversal of 47793281 is 18239774.

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 38551681 + 9241600 = 6209^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 47793281 - 2⁶ = 47793217 is a prime.

It is a super-2 number, since 2×47793281² = 4568395417489922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47793283) 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, 81266 + ... + 81851.

It is an arithmetic number, because the mean of its divisors is an integer number (11989173).

Almost surely, 2^47793281 is an apocalyptic number.

It is an amenable number.

47793281 is a deficient number, since it is larger than the sum of its proper divisors (163411).

47793281 is a wasteful number, since it uses less digits than its factorization.

47793281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163410.

The product of its digits is 84672, while the sum is 41.

The square root of 47793281 is about 6913.2684744627. The cubic root of 47793281 is about 362.9016548363.

The spelling of 47793281 in words is "forty-seven million, seven hundred ninety-three thousand, two hundred eighty-one".