54393809 has 4 divisors (see below), whose sum is σ = 56148480. Its totient is φ = 52639140.

The previous prime is 54393767. The next prime is 54393841. The reversal of 54393809 is 90839345.

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: 90839345 = 5 ⋅18167869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54393809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54393869) 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, 877289 + ... + 877350.

It is an arithmetic number, because the mean of its divisors is an integer number (14037120).

Almost surely, 2^54393809 is an apocalyptic number.

It is an amenable number.

54393809 is a deficient number, since it is larger than the sum of its proper divisors (1754671).

54393809 is a wasteful number, since it uses less digits than its factorization.

54393809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754670.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 54393809 is about 7375.2158612477. The cubic root of 54393809 is about 378.8929204623.

The spelling of 54393809 in words is "fifty-four million, three hundred ninety-three thousand, eight hundred nine".