212977697 has 2 divisors, whose sum is σ = 212977698. Its totient is φ = 212977696.

The previous prime is 212977693. The next prime is 212977747. The reversal of 212977697 is 796779212.

It is an a-pointer prime, because the next prime (212977747) can be obtained adding 212977697 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190329616 + 22648081 = 13796^2 + 4759^2 .

It is a cyclic number.

It is not a de Polignac number, because 212977697 - 2² = 212977693 is a prime.

It is not a weakly prime, because it can be changed into another prime (212977693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106488848 + 106488849.

It is an arithmetic number, because the mean of its divisors is an integer number (106488849).

Almost surely, 2^212977697 is an apocalyptic number.

It is an amenable number.

212977697 is a deficient number, since it is larger than the sum of its proper divisors (1).

212977697 is an equidigital number, since it uses as much as digits as its factorization.

212977697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 50.

The square root of 212977697 is about 14593.7554111339. The cubic root of 212977697 is about 597.1884168761.

The spelling of 212977697 in words is "two hundred twelve million, nine hundred seventy-seven thousand, six hundred ninety-seven".