47315819 has 2 divisors, whose sum is σ = 47315820. Its totient is φ = 47315818.

The previous prime is 47315789. The next prime is 47315837. The reversal of 47315819 is 91851374.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47315819 is a prime.

It is a super-2 number, since 2×47315819² = 4477573455281522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47311819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23657909 + 23657910.

It is an arithmetic number, because the mean of its divisors is an integer number (23657910).

Almost surely, 2^47315819 is an apocalyptic number.

47315819 is a deficient number, since it is larger than the sum of its proper divisors (1).

47315819 is an equidigital number, since it uses as much as digits as its factorization.

47315819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 47315819 is about 6878.6495040815. The cubic root of 47315819 is about 361.6891275123.

The spelling of 47315819 in words is "forty-seven million, three hundred fifteen thousand, eight hundred nineteen".