54647309 has 4 divisors (see below), whose sum is σ = 54693216. Its totient is φ = 54601404.

The previous prime is 54647303. The next prime is 54647311. The reversal of 54647309 is 90374645.

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: 90374645 = 5 ⋅18074929.

It is a cyclic number.

It is not a de Polignac number, because 54647309 - 2⁸ = 54647053 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 (54647303) 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, 21119 + ... + 23564.

It is an arithmetic number, because the mean of its divisors is an integer number (13673304).

Almost surely, 2^54647309 is an apocalyptic number.

It is an amenable number.

54647309 is a deficient number, since it is larger than the sum of its proper divisors (45907).

54647309 is a wasteful number, since it uses less digits than its factorization.

54647309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45906.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 54647309 is about 7392.3818218488. The cubic root of 54647309 is about 379.4806131362.

The spelling of 54647309 in words is "fifty-four million, six hundred forty-seven thousand, three hundred nine".