54988909 has 4 divisors (see below), whose sum is σ = 55032604. Its totient is φ = 54945216.

The previous prime is 54988903. The next prime is 54988943. The reversal of 54988909 is 90988945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47817225 + 7171684 = 6915^2 + 2678^2 .

It is a cyclic number.

It is not a de Polignac number, because 54988909 - 2⁹ = 54988397 is a prime.

It is a super-2 number, since 2×54988909² = 6047560226020562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54988903) 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, 19902 + ... + 22495.

It is an arithmetic number, because the mean of its divisors is an integer number (13758151).

Almost surely, 2^54988909 is an apocalyptic number.

It is an amenable number.

54988909 is a deficient number, since it is larger than the sum of its proper divisors (43695).

54988909 is a wasteful number, since it uses less digits than its factorization.

54988909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43694.

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 54988909 is about 7415.4506943274. The cubic root of 54988909 is about 380.2696816027.

The spelling of 54988909 in words is "fifty-four million, nine hundred eighty-eight thousand, nine hundred nine".