212061623 has 2 divisors, whose sum is σ = 212061624. Its totient is φ = 212061622.

The previous prime is 212061611. The next prime is 212061643. The reversal of 212061623 is 326160212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212061623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212061643) 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, 106030811 + 106030812.

It is an arithmetic number, because the mean of its divisors is an integer number (106030812).

Almost surely, 2^212061623 is an apocalyptic number.

212061623 is a deficient number, since it is larger than the sum of its proper divisors (1).

212061623 is an equidigital number, since it uses as much as digits as its factorization.

212061623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 212061623 is about 14562.3357673143. The cubic root of 212061623 is about 596.3309639875.

The spelling of 212061623 in words is "two hundred twelve million, sixty-one thousand, six hundred twenty-three".