654405057 has 6 divisors (see below), whose sum is σ = 945251762. Its totient is φ = 436270032.

The previous prime is 654405047. The next prime is 654405061. The reversal of 654405057 is 750504456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 468246321 + 186158736 = 21639^2 + 13644^2 .

It is not a de Polignac number, because 654405057 - 2⁸ = 654404801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654405047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36355828 + ... + 36355845.

Almost surely, 2^654405057 is an apocalyptic number.

It is an amenable number.

654405057 is a deficient number, since it is larger than the sum of its proper divisors (290846705).

654405057 is a wasteful number, since it uses less digits than its factorization.

654405057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72711679 (or 72711676 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 654405057 is about 25581.3419702720. The cubic root of 654405057 is about 868.1915386555.

The spelling of 654405057 in words is "six hundred fifty-four million, four hundred five thousand, fifty-seven".