212587649 has 2 divisors, whose sum is σ = 212587650. Its totient is φ = 212587648.

The previous prime is 212587631. The next prime is 212587663. The reversal of 212587649 is 946785212.

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., 135024400 + 77563249 = 11620^2 + 8807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212587649 is a prime.

It is not a weakly prime, because it can be changed into another prime (212587699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106293824 + 106293825.

It is an arithmetic number, because the mean of its divisors is an integer number (106293825).

Almost surely, 2^212587649 is an apocalyptic number.

It is an amenable number.

212587649 is a deficient number, since it is larger than the sum of its proper divisors (1).

212587649 is an equidigital number, since it uses as much as digits as its factorization.

212587649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 212587649 is about 14580.3857630723. The cubic root of 212587649 is about 596.8236298689.

The spelling of 212587649 in words is "two hundred twelve million, five hundred eighty-seven thousand, six hundred forty-nine".