212652989 has 2 divisors, whose sum is σ = 212652990. Its totient is φ = 212652988.

The previous prime is 212652961. The next prime is 212653037. The reversal of 212652989 is 989256212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119530489 + 93122500 = 10933^2 + 9650^2 .

It is a cyclic number.

It is not a de Polignac number, because 212652989 - 2²⁰ = 211604413 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 (212652689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106326494 + 106326495.

It is an arithmetic number, because the mean of its divisors is an integer number (106326495).

Almost surely, 2^212652989 is an apocalyptic number.

It is an amenable number.

212652989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212652989 is an equidigital number, since it uses as much as digits as its factorization.

212652989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 212652989 is about 14582.6262723832. The cubic root of 212652989 is about 596.8847692963.

The spelling of 212652989 in words is "two hundred twelve million, six hundred fifty-two thousand, nine hundred eighty-nine".