47869681 has 2 divisors, whose sum is σ = 47869682. Its totient is φ = 47869680.

The previous prime is 47869663. The next prime is 47869687. The reversal of 47869681 is 18696874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 8381025 = 6284^2 + 2895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47869681 is a prime.

It is a super-2 number, since 2×47869681² = 4583012718083522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47869687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23934840 + 23934841.

It is an arithmetic number, because the mean of its divisors is an integer number (23934841).

Almost surely, 2^47869681 is an apocalyptic number.

It is an amenable number.

47869681 is a deficient number, since it is larger than the sum of its proper divisors (1).

47869681 is an equidigital number, since it uses as much as digits as its factorization.

47869681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 47869681 is about 6918.7918743087. The cubic root of 47869681 is about 363.0949241643.

The spelling of 47869681 in words is "forty-seven million, eight hundred sixty-nine thousand, six hundred eighty-one".