212699749 has 2 divisors, whose sum is σ = 212699750. Its totient is φ = 212699748.

The previous prime is 212699651. The next prime is 212699771. The reversal of 212699749 is 947996212.

212699749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212634724 + 65025 = 14582^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 212699749 - 2¹⁹ = 212175461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212699789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106349874 + 106349875.

It is an arithmetic number, because the mean of its divisors is an integer number (106349875).

Almost surely, 2^212699749 is an apocalyptic number.

It is an amenable number.

212699749 is a deficient number, since it is larger than the sum of its proper divisors (1).

212699749 is an equidigital number, since it uses as much as digits as its factorization.

212699749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 212699749 is about 14584.2294619908. The cubic root of 212699749 is about 596.9285155054.

The spelling of 212699749 in words is "two hundred twelve million, six hundred ninety-nine thousand, seven hundred forty-nine".