652951021 has 2 divisors, whose sum is σ = 652951022. Its totient is φ = 652951020.

The previous prime is 652951007. The next prime is 652951063. The reversal of 652951021 is 120159256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519201796 + 133749225 = 22786^2 + 11565^2 .

It is a cyclic number.

It is not a de Polignac number, because 652951021 - 2⁹ = 652950509 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 (652951121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326475510 + 326475511.

It is an arithmetic number, because the mean of its divisors is an integer number (326475511).

Almost surely, 2^652951021 is an apocalyptic number.

It is an amenable number.

652951021 is a deficient number, since it is larger than the sum of its proper divisors (1).

652951021 is an equidigital number, since it uses as much as digits as its factorization.

652951021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 652951021 is about 25552.9063121986. The cubic root of 652951021 is about 867.5480443013.

The spelling of 652951021 in words is "six hundred fifty-two million, nine hundred fifty-one thousand, twenty-one".