212309827 has 2 divisors, whose sum is σ = 212309828. Its totient is φ = 212309826.

The previous prime is 212309807. The next prime is 212309869. The reversal of 212309827 is 728903212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212309827 - 2²³ = 203921219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212309792 and 212309801.

It is not a weakly prime, because it can be changed into another prime (212309807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106154913 + 106154914.

It is an arithmetic number, because the mean of its divisors is an integer number (106154914).

Almost surely, 2^212309827 is an apocalyptic number.

212309827 is a deficient number, since it is larger than the sum of its proper divisors (1).

212309827 is an equidigital number, since it uses as much as digits as its factorization.

212309827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 212309827 is about 14570.8553969903. The cubic root of 212309827 is about 596.5635284972.

The spelling of 212309827 in words is "two hundred twelve million, three hundred nine thousand, eight hundred twenty-seven".