212787449 has 12 divisors (see below), whose sum is σ = 247766004. Its totient is φ = 182214144.

The previous prime is 212787439. The next prime is 212787457. The reversal of 212787449 is 944787212.

It can be written as a sum of positive squares in 2 ways, for example, as 92775424 + 120012025 = 9632^2 + 10955^2 .

It is not a de Polignac number, because 212787449 - 2⁴ = 212787433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212787409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97757 + ... + 99909.

It is an arithmetic number, because the mean of its divisors is an integer number (20647167).

Almost surely, 2^212787449 is an apocalyptic number.

It is an amenable number.

212787449 is a deficient number, since it is larger than the sum of its proper divisors (34978555).

212787449 is a wasteful number, since it uses less digits than its factorization.

212787449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184 (or 4177 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 212787449 is about 14587.2358245145. The cubic root of 212787449 is about 597.0105457502.

The spelling of 212787449 in words is "two hundred twelve million, seven hundred eighty-seven thousand, four hundred forty-nine".