650745621 has 12 divisors (see below), whose sum is σ = 955375980. Its totient is φ = 426718080.

The previous prime is 650745619. The next prime is 650745631. The reversal of 650745621 is 126547056.

It is a happy number.

650745621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 208484721 + 442260900 = 14439^2 + 21030^2 .

It is not a de Polignac number, because 650745621 - 2¹ = 650745619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650745631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 592116 + ... + 593213.

It is an arithmetic number, because the mean of its divisors is an integer number (79614665).

Almost surely, 2^650745621 is an apocalyptic number.

650745621 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

650745621 is a deficient number, since it is larger than the sum of its proper divisors (304630359).

650745621 is a wasteful number, since it uses less digits than its factorization.

650745621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185396 (or 1185393 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 650745621 is about 25509.7162077511. The cubic root of 650745621 is about 866.5702023963.

The spelling of 650745621 in words is "six hundred fifty million, seven hundred forty-five thousand, six hundred twenty-one".