53638947 has 24 divisors (see below), whose sum is σ = 80703168. Its totient is φ = 34300800.

The previous prime is 53638939. The next prime is 53638973. The reversal of 53638947 is 74983635.

53638947 is a `hidden beast` number, since 5 + 3 + 638 + 9 + 4 + 7 = 666.

It is not a de Polignac number, because 53638947 - 2³ = 53638939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53638987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21318 + ... + 23700.

It is an arithmetic number, because the mean of its divisors is an integer number (3362632).

Almost surely, 2^53638947 is an apocalyptic number.

53638947 is a deficient number, since it is larger than the sum of its proper divisors (27064221).

53638947 is a wasteful number, since it uses less digits than its factorization.

53638947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491 (or 2488 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 53638947 is about 7323.8614814864. The cubic root of 53638947 is about 377.1320262656.

The spelling of 53638947 in words is "fifty-three million, six hundred thirty-eight thousand, nine hundred forty-seven".