47668919 has 2 divisors, whose sum is σ = 47668920. Its totient is φ = 47668918.

The previous prime is 47668883. The next prime is 47668921. The reversal of 47668919 is 91986674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47668919 - 2¹² = 47664823 is a prime.

It is a super-2 number, since 2×47668919² = 4544651677257122, which contains 22 as substring.

Together with 47668921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47668219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23834459 + 23834460.

It is an arithmetic number, because the mean of its divisors is an integer number (23834460).

Almost surely, 2^47668919 is an apocalyptic number.

47668919 is a deficient number, since it is larger than the sum of its proper divisors (1).

47668919 is an equidigital number, since it uses as much as digits as its factorization.

47668919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 47668919 is about 6904.2681726596. The cubic root of 47668919 is about 362.5866148953.

The spelling of 47668919 in words is "forty-seven million, six hundred sixty-eight thousand, nine hundred nineteen".