47047631 has 4 divisors (see below), whose sum is σ = 47067072. Its totient is φ = 47028192.

The previous prime is 47047621. The next prime is 47047661. The reversal of 47047631 is 13674074.

It is a happy number.

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-47047631 is a prime.

It is a super-2 number, since 2×47047631² = 4426959165424322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47047621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5471 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (11766768).

Almost surely, 2^47047631 is an apocalyptic number.

47047631 is a deficient number, since it is larger than the sum of its proper divisors (19441).

47047631 is a wasteful number, since it uses less digits than its factorization.

47047631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19440.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 47047631 is about 6859.1275684303. The cubic root of 47047631 is about 361.0044760714.

The spelling of 47047631 in words is "forty-seven million, forty-seven thousand, six hundred thirty-one".