54640489 has 4 divisors (see below), whose sum is σ = 54881424. Its totient is φ = 54399556.

The previous prime is 54640471. The next prime is 54640519. The reversal of 54640489 is 98404645.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54640489 - 2⁵ = 54640457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54640589) 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, 120127 + ... + 120580.

It is an arithmetic number, because the mean of its divisors is an integer number (13720356).

Almost surely, 2^54640489 is an apocalyptic number.

It is an amenable number.

54640489 is a deficient number, since it is larger than the sum of its proper divisors (240935).

54640489 is a wasteful number, since it uses less digits than its factorization.

54640489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240934.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 54640489 is about 7391.9205217589. The cubic root of 54640489 is about 379.4648260493.

The spelling of 54640489 in words is "fifty-four million, six hundred forty thousand, four hundred eighty-nine".