47418689 has 2 divisors, whose sum is σ = 47418690. Its totient is φ = 47418688.

The previous prime is 47418677. The next prime is 47418691. The reversal of 47418689 is 98681474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36966400 + 10452289 = 6080^2 + 3233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47418689 is a prime.

Together with 47418691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47418619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23709344 + 23709345.

It is an arithmetic number, because the mean of its divisors is an integer number (23709345).

Almost surely, 2^47418689 is an apocalyptic number.

It is an amenable number.

47418689 is a deficient number, since it is larger than the sum of its proper divisors (1).

47418689 is an equidigital number, since it uses as much as digits as its factorization.

47418689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 47418689 is about 6886.1229294865. The cubic root of 47418689 is about 361.9510556214.

The spelling of 47418689 in words is "forty-seven million, four hundred eighteen thousand, six hundred eighty-nine".