47319191 has 2 divisors, whose sum is σ = 47319192. Its totient is φ = 47319190.

The previous prime is 47319179. The next prime is 47319199. The reversal of 47319191 is 19191374.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47319191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47319199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23659595 + 23659596.

It is an arithmetic number, because the mean of its divisors is an integer number (23659596).

Almost surely, 2^47319191 is an apocalyptic number.

47319191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47319191 is an equidigital number, since it uses as much as digits as its factorization.

47319191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 47319191 is about 6878.8946059669. The cubic root of 47319191 is about 361.6977193306.

The spelling of 47319191 in words is "forty-seven million, three hundred nineteen thousand, one hundred ninety-one".