212768749 has 2 divisors, whose sum is σ = 212768750. Its totient is φ = 212768748.

The previous prime is 212768741. The next prime is 212768761. The reversal of 212768749 is 947867212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121947849 + 90820900 = 11043^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 212768749 - 2³ = 212768741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212768699 and 212768708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212768741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106384374 + 106384375.

It is an arithmetic number, because the mean of its divisors is an integer number (106384375).

Almost surely, 2^212768749 is an apocalyptic number.

It is an amenable number.

212768749 is a deficient number, since it is larger than the sum of its proper divisors (1).

212768749 is an equidigital number, since it uses as much as digits as its factorization.

212768749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 212768749 is about 14586.5948390980. The cubic root of 212768749 is about 596.9930565854.

It can be divided in two parts, 2127 and 68749, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 212768749 in words is "two hundred twelve million, seven hundred sixty-eight thousand, seven hundred forty-nine".