47863918 has 4 divisors (see below), whose sum is σ = 71795880. Its totient is φ = 23931958.

The previous prime is 47863913. The next prime is 47863919. The reversal of 47863918 is 81936874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81936874 = 2 ⋅40968437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47863913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11965978 + ... + 11965981.

It is an arithmetic number, because the mean of its divisors is an integer number (17948970).

Almost surely, 2^47863918 is an apocalyptic number.

47863918 is a deficient number, since it is larger than the sum of its proper divisors (23931962).

47863918 is a wasteful number, since it uses less digits than its factorization.

47863918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23931961.

The product of its digits is 290304, while the sum is 46.

The square root of 47863918 is about 6918.3753873290. The cubic root of 47863918 is about 363.0803526583.

The spelling of 47863918 in words is "forty-seven million, eight hundred sixty-three thousand, nine hundred eighteen".