54897509 has 4 divisors (see below), whose sum is σ = 54952716. Its totient is φ = 54842304.

The previous prime is 54897503. The next prime is 54897587. The reversal of 54897509 is 90579845.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90579845 = 5 ⋅18115969.

It can be written as a sum of positive squares in 2 ways, for example, as 17724100 + 37173409 = 4210^2 + 6097^2 .

It is a cyclic number.

It is not a de Polignac number, because 54897509 - 2²⁴ = 38120293 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 (54897503) 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, 26084 + ... + 28109.

It is an arithmetic number, because the mean of its divisors is an integer number (13738179).

Almost surely, 2^54897509 is an apocalyptic number.

It is an amenable number.

54897509 is a deficient number, since it is larger than the sum of its proper divisors (55207).

54897509 is a wasteful number, since it uses less digits than its factorization.

54897509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55206.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 54897509 is about 7409.2853231604. The cubic root of 54897509 is about 380.0588759190.

The spelling of 54897509 in words is "fifty-four million, eight hundred ninety-seven thousand, five hundred nine".