650740609 has 8 divisors (see below), whose sum is σ = 655713792. Its totient is φ = 645784320.

The previous prime is 650740591. The next prime is 650740613. The reversal of 650740609 is 906047056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 650740609 - 2¹⁹ = 650216321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650740109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79272 + ... + 87094.

It is an arithmetic number, because the mean of its divisors is an integer number (81964224).

Almost surely, 2^650740609 is an apocalyptic number.

It is an amenable number.

650740609 is a deficient number, since it is larger than the sum of its proper divisors (4973183).

650740609 is a wasteful number, since it uses less digits than its factorization.

650740609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 650740609 is about 25509.6179704832. The cubic root of 650740609 is about 866.5679776350.

The spelling of 650740609 in words is "six hundred fifty million, seven hundred forty thousand, six hundred nine".