650460821 has 2 divisors, whose sum is σ = 650460822. Its totient is φ = 650460820.

The previous prime is 650460787. The next prime is 650460847. The reversal of 650460821 is 128064056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593458321 + 57002500 = 24361^2 + 7550^2 .

It is a cyclic number.

It is not a de Polignac number, because 650460821 - 2¹⁴ = 650444437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650480821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325230410 + 325230411.

It is an arithmetic number, because the mean of its divisors is an integer number (325230411).

Almost surely, 2^650460821 is an apocalyptic number.

It is an amenable number.

650460821 is a deficient number, since it is larger than the sum of its proper divisors (1).

650460821 is an equidigital number, since it uses as much as digits as its factorization.

650460821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 650460821 is about 25504.1334100965. The cubic root of 650460821 is about 866.4437652763.

The spelling of 650460821 in words is "six hundred fifty million, four hundred sixty thousand, eight hundred twenty-one".