54986409 has 6 divisors (see below), whose sum is σ = 79424826. Its totient is φ = 36657600.

The previous prime is 54986401. The next prime is 54986413. The reversal of 54986409 is 90468945.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45968400 + 9018009 = 6780^2 + 3003^2 .

It is not a de Polignac number, because 54986409 - 2³ = 54986401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54986401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3054792 + ... + 3054809.

It is an arithmetic number, because the mean of its divisors is an integer number (13237471).

Almost surely, 2^54986409 is an apocalyptic number.

It is an amenable number.

54986409 is a deficient number, since it is larger than the sum of its proper divisors (24438417).

54986409 is a wasteful number, since it uses less digits than its factorization.

54986409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6109607 (or 6109604 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 54986409 is about 7415.2821254488. The cubic root of 54986409 is about 380.2639186914.

The spelling of 54986409 in words is "fifty-four million, nine hundred eighty-six thousand, four hundred nine".