47971318 has 4 divisors (see below), whose sum is σ = 71956980. Its totient is φ = 23985658.

The previous prime is 47971309. The next prime is 47971321. The reversal of 47971318 is 81317974.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81317974 = 2 ⋅40658987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11992828 + ... + 11992831.

It is an arithmetic number, because the mean of its divisors is an integer number (17989245).

Almost surely, 2^47971318 is an apocalyptic number.

47971318 is a deficient number, since it is larger than the sum of its proper divisors (23985662).

47971318 is a wasteful number, since it uses less digits than its factorization.

47971318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23985661.

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

The square root of 47971318 is about 6926.1329759109. The cubic root of 47971318 is about 363.3517171257.

The spelling of 47971318 in words is "forty-seven million, nine hundred seventy-one thousand, three hundred eighteen".