47317819 has 4 divisors (see below), whose sum is σ = 47347840. Its totient is φ = 47287800.

The previous prime is 47317789. The next prime is 47317843. The reversal of 47317819 is 91871374.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47317819 - 2⁷ = 47317691 is a prime.

It is a super-2 number, since 2×47317819² = 4477951989833522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47317849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12507 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (11836960).

Almost surely, 2^47317819 is an apocalyptic number.

47317819 is a deficient number, since it is larger than the sum of its proper divisors (30021).

47317819 is a wasteful number, since it uses less digits than its factorization.

47317819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30020.

The product of its digits is 42336, while the sum is 40.

The square root of 47317819 is about 6878.7948799190. The cubic root of 47317819 is about 361.6942235392.

The spelling of 47317819 in words is "forty-seven million, three hundred seventeen thousand, eight hundred nineteen".