54393917 has 4 divisors (see below), whose sum is σ = 54502560. Its totient is φ = 54285276.

The previous prime is 54393907. The next prime is 54393947. The reversal of 54393917 is 71939345.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71939345 = 5 ⋅14387869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54393917 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 (54393907) 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, 53567 + ... + 54572.

It is an arithmetic number, because the mean of its divisors is an integer number (13625640).

Almost surely, 2^54393917 is an apocalyptic number.

It is an amenable number.

54393917 is a deficient number, since it is larger than the sum of its proper divisors (108643).

54393917 is a wasteful number, since it uses less digits than its factorization.

54393917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108642.

The product of its digits is 102060, while the sum is 41.

The square root of 54393917 is about 7375.2231830637. The cubic root of 54393917 is about 378.8931712286.

The spelling of 54393917 in words is "fifty-four million, three hundred ninety-three thousand, nine hundred seventeen".