654491973 has 16 divisors (see below), whose sum is σ = 884257920. Its totient is φ = 430557504.

The previous prime is 654491953. The next prime is 654491977. The reversal of 654491973 is 379194456.

It is not a de Polignac number, because 654491973 - 2⁵ = 654491941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654491977) 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 15 ways as a sum of consecutive naturals, for example, 86923 + ... + 94151.

It is an arithmetic number, because the mean of its divisors is an integer number (55266120).

Almost surely, 2^654491973 is an apocalyptic number.

It is an amenable number.

654491973 is a deficient number, since it is larger than the sum of its proper divisors (229765947).

654491973 is a wasteful number, since it uses less digits than its factorization.

654491973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628.

The product of its digits is 816480, while the sum is 48.

The square root of 654491973 is about 25583.0407301400. The cubic root of 654491973 is about 868.2299737676.

The spelling of 654491973 in words is "six hundred fifty-four million, four hundred ninety-one thousand, nine hundred seventy-three".