47811137 has 4 divisors (see below), whose sum is σ = 52157616. Its totient is φ = 43464660.

The previous prime is 47811121. The next prime is 47811139. The reversal of 47811137 is 73111874.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 47811137 - 2⁴ = 47811121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47811139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173223 + ... + 2173244.

It is an arithmetic number, because the mean of its divisors is an integer number (13039404).

Almost surely, 2^47811137 is an apocalyptic number.

It is an amenable number.

47811137 is a deficient number, since it is larger than the sum of its proper divisors (4346479).

47811137 is a wasteful number, since it uses less digits than its factorization.

47811137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346478.

The product of its digits is 4704, while the sum is 32.

The square root of 47811137 is about 6914.5597835292. The cubic root of 47811137 is about 362.9468436508.

The spelling of 47811137 in words is "forty-seven million, eight hundred eleven thousand, one hundred thirty-seven".