212774077 has 2 divisors, whose sum is σ = 212774078. Its totient is φ = 212774076.

The previous prime is 212774063. The next prime is 212774083. The reversal of 212774077 is 770477212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155226681 + 57547396 = 12459^2 + 7586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212774077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212774017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106387038 + 106387039.

It is an arithmetic number, because the mean of its divisors is an integer number (106387039).

Almost surely, 2^212774077 is an apocalyptic number.

It is an amenable number.

212774077 is a deficient number, since it is larger than the sum of its proper divisors (1).

212774077 is an equidigital number, since it uses as much as digits as its factorization.

212774077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38416, while the sum is 37.

The square root of 212774077 is about 14586.7774713951. Note that the first 3 decimals coincide. The cubic root of 212774077 is about 596.9980396989.

The spelling of 212774077 in words is "two hundred twelve million, seven hundred seventy-four thousand, seventy-seven".