53817917 has 4 divisors (see below), whose sum is σ = 53860896. Its totient is φ = 53774940.

The previous prime is 53817913. The next prime is 53817919. The reversal of 53817917 is 71971835.

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 not a de Polignac number, because 53817917 - 2² = 53817913 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 (53817913) 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, 19553 + ... + 22134.

It is an arithmetic number, because the mean of its divisors is an integer number (13465224).

Almost surely, 2^53817917 is an apocalyptic number.

It is an amenable number.

53817917 is a deficient number, since it is larger than the sum of its proper divisors (42979).

53817917 is a wasteful number, since it uses less digits than its factorization.

53817917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42978.

The product of its digits is 52920, while the sum is 41.

The square root of 53817917 is about 7336.0695880015. The cubic root of 53817917 is about 377.5510028599.

The spelling of 53817917 in words is "fifty-three million, eight hundred seventeen thousand, nine hundred seventeen".