47868781 has 2 divisors, whose sum is σ = 47868782. Its totient is φ = 47868780.

The previous prime is 47868757. The next prime is 47868797. The reversal of 47868781 is 18786874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42693156 + 5175625 = 6534^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 47868781 - 2⁵ = 47868749 is a prime.

It is a super-2 number, since 2×47868781² = 4582840388851922, which contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47860781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23934390 + 23934391.

It is an arithmetic number, because the mean of its divisors is an integer number (23934391).

Almost surely, 2^47868781 is an apocalyptic number.

It is an amenable number.

47868781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47868781 is an equidigital number, since it uses as much as digits as its factorization.

47868781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 49.

The square root of 47868781 is about 6918.7268337462. The cubic root of 47868781 is about 363.0926486287.

The spelling of 47868781 in words is "forty-seven million, eight hundred sixty-eight thousand, seven hundred eighty-one".