53945663 has 4 divisors (see below), whose sum is σ = 54370560. Its totient is φ = 53520768.

The previous prime is 53945657. The next prime is 53945699. The reversal of 53945663 is 36654935.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53945663 - 2¹⁸ = 53683519 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 53945663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53944663) 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, 212258 + ... + 212511.

It is an arithmetic number, because the mean of its divisors is an integer number (13592640).

Almost surely, 2^53945663 is an apocalyptic number.

53945663 is a deficient number, since it is larger than the sum of its proper divisors (424897).

53945663 is a wasteful number, since it uses less digits than its factorization.

53945663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424896.

The product of its digits is 291600, while the sum is 41.

The square root of 53945663 is about 7344.7711332621. The cubic root of 53945663 is about 377.8494940324.

The spelling of 53945663 in words is "fifty-three million, nine hundred forty-five thousand, six hundred sixty-three".