650375021 has 4 divisors (see below), whose sum is σ = 650435232. Its totient is φ = 650314812.

The previous prime is 650374999. The next prime is 650375027. The reversal of 650375021 is 120573056.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 650375021 - 2²⁶ = 583266157 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 (650375027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8945 + ... + 37158.

It is an arithmetic number, because the mean of its divisors is an integer number (162608808).

Almost surely, 2^650375021 is an apocalyptic number.

It is an amenable number.

650375021 is a deficient number, since it is larger than the sum of its proper divisors (60211).

650375021 is a wasteful number, since it uses less digits than its factorization.

650375021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60210.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 650375021 is about 25502.4512743383. The cubic root of 650375021 is about 866.4056670842.

The spelling of 650375021 in words is "six hundred fifty million, three hundred seventy-five thousand, twenty-one".