47618913 has 4 divisors (see below), whose sum is σ = 63491888. Its totient is φ = 31745940.

The previous prime is 47618911. The next prime is 47618927. The reversal of 47618913 is 31981674.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47618913 - 2¹ = 47618911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47618911) 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, 7936483 + ... + 7936488.

It is an arithmetic number, because the mean of its divisors is an integer number (15872972).

Almost surely, 2^47618913 is an apocalyptic number.

It is an amenable number.

47618913 is a deficient number, since it is larger than the sum of its proper divisors (15872975).

47618913 is a wasteful number, since it uses less digits than its factorization.

47618913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872974.

The product of its digits is 36288, while the sum is 39.

The square root of 47618913 is about 6900.6458393400. The cubic root of 47618913 is about 362.4597827757.

The spelling of 47618913 in words is "forty-seven million, six hundred eighteen thousand, nine hundred thirteen".