652121999 has 2 divisors, whose sum is σ = 652122000. Its totient is φ = 652121998.

The previous prime is 652121993. The next prime is 652122019. The reversal of 652121999 is 999121256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 652121999 - 2²⁸ = 383686543 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 (652121993) 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 as a sum of consecutive naturals, namely, 326060999 + 326061000.

It is an arithmetic number, because the mean of its divisors is an integer number (326061000).

Almost surely, 2^652121999 is an apocalyptic number.

652121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

652121999 is an equidigital number, since it uses as much as digits as its factorization.

652121999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 44.

The square root of 652121999 is about 25536.6794826579. The cubic root of 652121999 is about 867.1807267987.

The spelling of 652121999 in words is "six hundred fifty-two million, one hundred twenty-one thousand, nine hundred ninety-nine".