54578709 has 12 divisors (see below), whose sum is σ = 78938496. Its totient is φ = 36338472.

The previous prime is 54578707. The next prime is 54578723. The reversal of 54578709 is 90787545.

54578709 is a `hidden beast` number, since 5 + 4 + 578 + 70 + 9 = 666.

It is not a de Polignac number, because 54578709 - 2¹ = 54578707 is a prime.

It is a super-2 number, since 2×54578709² = 5957670952213362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54578707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4254 + ... + 11280.

It is an arithmetic number, because the mean of its divisors is an integer number (6578208).

Almost surely, 2^54578709 is an apocalyptic number.

It is an amenable number.

54578709 is a deficient number, since it is larger than the sum of its proper divisors (24359787).

54578709 is a wasteful number, since it uses less digits than its factorization.

54578709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896 (or 7893 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 54578709 is about 7387.7404529396. The cubic root of 54578709 is about 379.3217564536.

The spelling of 54578709 in words is "fifty-four million, five hundred seventy-eight thousand, seven hundred nine".