47388013 has 4 divisors (see below), whose sum is σ = 47537820. Its totient is φ = 47238208.

The previous prime is 47388007. The next prime is 47388017. The reversal of 47388013 is 31088374.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31088374 = 2 ⋅15544187.

It can be written as a sum of positive squares in 2 ways, for example, as 4380649 + 43007364 = 2093^2 + 6558^2 .

It is a cyclic number.

It is not a de Polignac number, because 47388013 - 2¹³ = 47379821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47388013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47388017) 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, 74428 + ... + 75061.

It is an arithmetic number, because the mean of its divisors is an integer number (11884455).

Almost surely, 2^47388013 is an apocalyptic number.

It is an amenable number.

47388013 is a deficient number, since it is larger than the sum of its proper divisors (149807).

47388013 is a wasteful number, since it uses less digits than its factorization.

47388013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149806.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 47388013 is about 6883.8951909511. The cubic root of 47388013 is about 361.8729879089.

The spelling of 47388013 in words is "forty-seven million, three hundred eighty-eight thousand, thirteen".