212090999 has 2 divisors, whose sum is σ = 212091000. Its totient is φ = 212090998.

The previous prime is 212090971. The next prime is 212091043. The reversal of 212090999 is 999090212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212090999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212090399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106045499 + 106045500.

It is an arithmetic number, because the mean of its divisors is an integer number (106045500).

Almost surely, 2^212090999 is an apocalyptic number.

212090999 is a deficient number, since it is larger than the sum of its proper divisors (1).

212090999 is an equidigital number, since it uses as much as digits as its factorization.

212090999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 212090999 is about 14563.3443617872. The cubic root of 212090999 is about 596.3584984518.

The spelling of 212090999 in words is "two hundred twelve million, ninety thousand, nine hundred ninety-nine".