47387311 has 4 divisors (see below), whose sum is σ = 49881400. Its totient is φ = 44893224.

The previous prime is 47387297. The next prime is 47387321. The reversal of 47387311 is 11378374.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47387311 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 (47387321) 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, 1247016 + ... + 1247053.

It is an arithmetic number, because the mean of its divisors is an integer number (12470350).

Almost surely, 2^47387311 is an apocalyptic number.

47387311 is a deficient number, since it is larger than the sum of its proper divisors (2494089).

47387311 is a wasteful number, since it uses less digits than its factorization.

47387311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494088.

The product of its digits is 14112, while the sum is 34.

The square root of 47387311 is about 6883.8442021882. The cubic root of 47387311 is about 361.8712009866.

The spelling of 47387311 in words is "forty-seven million, three hundred eighty-seven thousand, three hundred eleven".