212791489 has 2 divisors, whose sum is σ = 212791490. Its totient is φ = 212791488.

The previous prime is 212791463. The next prime is 212791541. The reversal of 212791489 is 984197212.

It is a happy number.

212791489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163328400 + 49463089 = 12780^2 + 7033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212791489 is a prime.

It is not a weakly prime, because it can be changed into another prime (212791429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106395744 + 106395745.

It is an arithmetic number, because the mean of its divisors is an integer number (106395745).

Almost surely, 2^212791489 is an apocalyptic number.

It is an amenable number.

212791489 is a deficient number, since it is larger than the sum of its proper divisors (1).

212791489 is an equidigital number, since it uses as much as digits as its factorization.

212791489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 212791489 is about 14587.3743010865. The cubic root of 212791489 is about 597.0143240234.

The spelling of 212791489 in words is "two hundred twelve million, seven hundred ninety-one thousand, four hundred eighty-nine".