650040257 has 4 divisors (see below), whose sum is σ = 651678036. Its totient is φ = 648402480.

The previous prime is 650040241. The next prime is 650040289. The reversal of 650040257 is 752040056.

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 221384641 + 428655616 = 14879^2 + 20704^2 .

It is a cyclic number.

It is not a de Polignac number, because 650040257 - 2⁴ = 650040241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650040227) 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, 818294 + ... + 819087.

It is an arithmetic number, because the mean of its divisors is an integer number (162919509).

Almost surely, 2^650040257 is an apocalyptic number.

It is an amenable number.

650040257 is a deficient number, since it is larger than the sum of its proper divisors (1637779).

650040257 is a wasteful number, since it uses less digits than its factorization.

650040257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637778.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 650040257 is about 25495.8870604653. The cubic root of 650040257 is about 866.2569881449.

The spelling of 650040257 in words is "six hundred fifty million, forty thousand, two hundred fifty-seven".