650620861 has 4 divisors (see below), whose sum is σ = 709768224. Its totient is φ = 591473500.

The previous prime is 650620823. The next prime is 650620871. The reversal of 650620861 is 168026056.

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 650620861 - 2¹⁵ = 650588093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650620871) 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, 29573665 + ... + 29573686.

It is an arithmetic number, because the mean of its divisors is an integer number (177442056).

Almost surely, 2^650620861 is an apocalyptic number.

It is an amenable number.

650620861 is a deficient number, since it is larger than the sum of its proper divisors (59147363).

650620861 is a wasteful number, since it uses less digits than its factorization.

650620861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59147362.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 650620861 is about 25507.2707477692. The cubic root of 650620861 is about 866.5148196656.

The spelling of 650620861 in words is "six hundred fifty million, six hundred twenty thousand, eight hundred sixty-one".