47431889 has 2 divisors, whose sum is σ = 47431890. Its totient is φ = 47431888.

The previous prime is 47431871. The next prime is 47431897. The reversal of 47431889 is 98813474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46471489 + 960400 = 6817^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47431889 is a prime.

It is not a weakly prime, because it can be changed into another prime (47461889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23715944 + 23715945.

It is an arithmetic number, because the mean of its divisors is an integer number (23715945).

Almost surely, 2^47431889 is an apocalyptic number.

It is an amenable number.

47431889 is a deficient number, since it is larger than the sum of its proper divisors (1).

47431889 is an equidigital number, since it uses as much as digits as its factorization.

47431889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 47431889 is about 6887.0813121380. The cubic root of 47431889 is about 361.9846380954.

The spelling of 47431889 in words is "forty-seven million, four hundred thirty-one thousand, eight hundred eighty-nine".