47881913 has 2 divisors, whose sum is σ = 47881914. Its totient is φ = 47881912.

The previous prime is 47881907. The next prime is 47881937. The reversal of 47881913 is 31918874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 8543929 = 6272^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 47881913 - 2⁶ = 47881849 is a prime.

It is a super-3 number, since 3×47881913³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47881993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23940956 + 23940957.

It is an arithmetic number, because the mean of its divisors is an integer number (23940957).

Almost surely, 2^47881913 is an apocalyptic number.

It is an amenable number.

47881913 is a deficient number, since it is larger than the sum of its proper divisors (1).

47881913 is an equidigital number, since it uses as much as digits as its factorization.

47881913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 47881913 is about 6919.6757872028. The cubic root of 47881913 is about 363.1258483928.

The spelling of 47881913 in words is "forty-seven million, eight hundred eighty-one thousand, nine hundred thirteen".