212649799 has 2 divisors, whose sum is σ = 212649800. Its totient is φ = 212649798.

The previous prime is 212649791. The next prime is 212649823. The reversal of 212649799 is 997946212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212649799 - 2³ = 212649791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212649791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106324899 + 106324900.

It is an arithmetic number, because the mean of its divisors is an integer number (106324900).

Almost surely, 2^212649799 is an apocalyptic number.

212649799 is a deficient number, since it is larger than the sum of its proper divisors (1).

212649799 is an equidigital number, since it uses as much as digits as its factorization.

212649799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 212649799 is about 14582.5168952414. The cubic root of 212649799 is about 596.8817846656.

The spelling of 212649799 in words is "two hundred twelve million, six hundred forty-nine thousand, seven hundred ninety-nine".