212072779 has 2 divisors, whose sum is σ = 212072780. Its totient is φ = 212072778.

The previous prime is 212072761. The next prime is 212072797. The reversal of 212072779 is 977270212.

Together with next prime (212072797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (212072761) and next prime (212072797).

It is a cyclic number.

It is not a de Polignac number, because 212072779 - 2⁵ = 212072747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212072479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106036389 + 106036390.

It is an arithmetic number, because the mean of its divisors is an integer number (106036390).

Almost surely, 2^212072779 is an apocalyptic number.

212072779 is a deficient number, since it is larger than the sum of its proper divisors (1).

212072779 is an equidigital number, since it uses as much as digits as its factorization.

212072779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 212072779 is about 14562.7188052232. The cubic root of 212072779 is about 596.3414209346.

The spelling of 212072779 in words is "two hundred twelve million, seventy-two thousand, seven hundred seventy-nine".