54979509 has 8 divisors (see below), whose sum is σ = 78944992. Its totient is φ = 33833520.

The previous prime is 54979487. The next prime is 54979511. The reversal of 54979509 is 90597945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54979509 - 2¹³ = 54971317 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 (54979549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704827 + ... + 704904.

It is an arithmetic number, because the mean of its divisors is an integer number (9868124).

Almost surely, 2^54979509 is an apocalyptic number.

It is an amenable number.

54979509 is a deficient number, since it is larger than the sum of its proper divisors (23965483).

54979509 is a wasteful number, since it uses less digits than its factorization.

54979509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409747.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 54979509 is about 7414.8168554591. The cubic root of 54979509 is about 380.2480121498.

The spelling of 54979509 in words is "fifty-four million, nine hundred seventy-nine thousand, five hundred nine".