47439137 has 4 divisors (see below), whose sum is σ = 47453616. Its totient is φ = 47424660.

The previous prime is 47439109. The next prime is 47439167. The reversal of 47439137 is 73193474.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47439137 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 47439137.

It is not an unprimeable number, because it can be changed into a prime (47439107) 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, 278 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (11863404).

Almost surely, 2^47439137 is an apocalyptic number.

It is an amenable number.

47439137 is a deficient number, since it is larger than the sum of its proper divisors (14479).

47439137 is an equidigital number, since it uses as much as digits as its factorization.

47439137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14478.

The product of its digits is 63504, while the sum is 38.

The square root of 47439137 is about 6887.6074946239. The cubic root of 47439137 is about 362.0030752768.

The spelling of 47439137 in words is "forty-seven million, four hundred thirty-nine thousand, one hundred thirty-seven".