654056749 has 4 divisors (see below), whose sum is σ = 676610460. Its totient is φ = 631503040.

The previous prime is 654056719. The next prime is 654056783. The reversal of 654056749 is 947650456.

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 216619524 + 437437225 = 14718^2 + 20915^2 .

It is a cyclic number.

It is not a de Polignac number, because 654056749 - 2⁵ = 654056717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 654056699 and 654056708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654056719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11276812 + ... + 11276869.

It is an arithmetic number, because the mean of its divisors is an integer number (169152615).

Almost surely, 2^654056749 is an apocalyptic number.

It is an amenable number.

654056749 is a deficient number, since it is larger than the sum of its proper divisors (22553711).

654056749 is a wasteful number, since it uses less digits than its factorization.

654056749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22553710.

The product of its (nonzero) digits is 907200, while the sum is 46.

The square root of 654056749 is about 25574.5332117714. The cubic root of 654056749 is about 868.0374792689.

The spelling of 654056749 in words is "six hundred fifty-four million, fifty-six thousand, seven hundred forty-nine".