654577709 has 4 divisors (see below), whose sum is σ = 658497504. Its totient is φ = 650657916.

The previous prime is 654577697. The next prime is 654577747. The reversal of 654577709 is 907775456.

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 654577709 - 2⁸ = 654577453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654577109) 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, 1959647 + ... + 1959980.

It is an arithmetic number, because the mean of its divisors is an integer number (164624376).

Almost surely, 2^654577709 is an apocalyptic number.

It is an amenable number.

654577709 is a deficient number, since it is larger than the sum of its proper divisors (3919795).

654577709 is a wasteful number, since it uses less digits than its factorization.

654577709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919794.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The square root of 654577709 is about 25584.7163165824. The cubic root of 654577709 is about 868.2678837385.

The spelling of 654577709 in words is "six hundred fifty-four million, five hundred seventy-seven thousand, seven hundred nine".