212370989 has 2 divisors, whose sum is σ = 212370990. Its totient is φ = 212370988.

The previous prime is 212370971. The next prime is 212371001. The reversal of 212370989 is 989073212.

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., 175562500 + 36808489 = 13250^2 + 6067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212370989 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 (212370959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106185494 + 106185495.

It is an arithmetic number, because the mean of its divisors is an integer number (106185495).

Almost surely, 2^212370989 is an apocalyptic number.

It is an amenable number.

212370989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212370989 is an equidigital number, since it uses as much as digits as its factorization.

212370989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 212370989 is about 14572.9540244935. The cubic root of 212370989 is about 596.6208088029.

The spelling of 212370989 in words is "two hundred twelve million, three hundred seventy thousand, nine hundred eighty-nine".