212910766949 has 4 divisors (see below), whose sum is σ = 213152437260. Its totient is φ = 212669096640.

The previous prime is 212910766919. The next prime is 212910766973. The reversal of 212910766949 is 949667019212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31951562500 + 180959204449 = 178750^2 + 425393^2 .

It is a cyclic number.

It is not a de Polignac number, because 212910766949 - 2¹² = 212910762853 is a prime.

It is a super-2 number, since 2×212910766949² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212910766894 and 212910766903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212910766909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120833834 + ... + 120835595.

It is an arithmetic number, because the mean of its divisors is an integer number (53288109315).

Almost surely, 2^212910766949 is an apocalyptic number.

It is an amenable number.

212910766949 is a deficient number, since it is larger than the sum of its proper divisors (241670311).

212910766949 is an equidigital number, since it uses as much as digits as its factorization.

212910766949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241670310.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 212910766949 in words is "two hundred twelve billion, nine hundred ten million, seven hundred sixty-six thousand, nine hundred forty-nine".