53863909 has 4 divisors (see below), whose sum is σ = 58760640. Its totient is φ = 48967180.

The previous prime is 53863903. The next prime is 53863919. The reversal of 53863909 is 90936835.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53863909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53863903) 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, 2448349 + ... + 2448370.

It is an arithmetic number, because the mean of its divisors is an integer number (14690160).

Almost surely, 2^53863909 is an apocalyptic number.

It is an amenable number.

53863909 is a deficient number, since it is larger than the sum of its proper divisors (4896731).

53863909 is a wasteful number, since it uses less digits than its factorization.

53863909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896730.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 53863909 is about 7339.2035671454. The cubic root of 53863909 is about 377.6585220815.

The spelling of 53863909 in words is "fifty-three million, eight hundred sixty-three thousand, nine hundred nine".