47806013 has 4 divisors (see below), whose sum is σ = 48155100. Its totient is φ = 47456928.

The previous prime is 47806001. The next prime is 47806037. The reversal of 47806013 is 31060874.

47806013 = T₂₆₂ + T₂₆₃ + ... + T₆₇₂.

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 37295449 + 10510564 = 6107^2 + 3242^2 .

It is a cyclic number.

It is not a de Polignac number, because 47806013 - 2⁸ = 47805757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47806093) 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, 174338 + ... + 174611.

It is an arithmetic number, because the mean of its divisors is an integer number (12038775).

Almost surely, 2^47806013 is an apocalyptic number.

It is an amenable number.

47806013 is a deficient number, since it is larger than the sum of its proper divisors (349087).

47806013 is a wasteful number, since it uses less digits than its factorization.

47806013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349086.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 47806013 is about 6914.1892510981. The cubic root of 47806013 is about 362.9338773130.

Adding to 47806013 its reverse (31060874), we get a palindrome (78866887).

The spelling of 47806013 in words is "forty-seven million, eight hundred six thousand, thirteen".