47632649 has 4 divisors (see below), whose sum is σ = 47648580. Its totient is φ = 47616720.

The previous prime is 47632631. The next prime is 47632679. The reversal of 47632649 is 94623674.

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 17305600 + 30327049 = 4160^2 + 5507^2 .

It is a cyclic number.

It is not a de Polignac number, because 47632649 - 2⁸ = 47632393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47632619) 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, 1982 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (11912145).

Almost surely, 2^47632649 is an apocalyptic number.

It is an amenable number.

47632649 is a deficient number, since it is larger than the sum of its proper divisors (15931).

47632649 is a wasteful number, since it uses less digits than its factorization.

47632649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930.

The product of its digits is 217728, while the sum is 41.

The square root of 47632649 is about 6901.6410367390. The cubic root of 47632649 is about 362.4946307568.

Subtracting 47632649 from its reverse (94623674), we obtain a square (46991025 = 6855²).

The spelling of 47632649 in words is "forty-seven million, six hundred thirty-two thousand, six hundred forty-nine".