652169989 has 2 divisors, whose sum is σ = 652169990. Its totient is φ = 652169988.

The previous prime is 652169939. The next prime is 652170023. The reversal of 652169989 is 989961256.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648109764 + 4060225 = 25458^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652169989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652169939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326084994 + 326084995.

It is an arithmetic number, because the mean of its divisors is an integer number (326084995).

Almost surely, 2^652169989 is an apocalyptic number.

It is an amenable number.

652169989 is a deficient number, since it is larger than the sum of its proper divisors (1).

652169989 is an equidigital number, since it uses as much as digits as its factorization.

652169989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 55.

The square root of 652169989 is about 25537.6190941912. The cubic root of 652169989 is about 867.2019983718.

The spelling of 652169989 in words is "six hundred fifty-two million, one hundred sixty-nine thousand, nine hundred eighty-nine".