47319865 has 4 divisors (see below), whose sum is σ = 56783844. Its totient is φ = 37855888.

The previous prime is 47319847. The next prime is 47319871. The reversal of 47319865 is 56891374.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15023376 + 32296489 = 3876^2 + 5683^2 .

It is a cyclic number.

It is not a de Polignac number, because 47319865 - 2¹⁷ = 47188793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4731982 + ... + 4731991.

It is an arithmetic number, because the mean of its divisors is an integer number (14195961).

Almost surely, 2^47319865 is an apocalyptic number.

It is an amenable number.

47319865 is a deficient number, since it is larger than the sum of its proper divisors (9463979).

47319865 is an equidigital number, since it uses as much as digits as its factorization.

47319865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9463978.

The product of its digits is 181440, while the sum is 43.

The square root of 47319865 is about 6878.9435962217. The cubic root of 47319865 is about 361.6994366262.

It can be divided in two parts, 47319 and 865, that added together give a palindrome (48184).

The spelling of 47319865 in words is "forty-seven million, three hundred nineteen thousand, eight hundred sixty-five".