912109999 has 2 divisors, whose sum is σ = 912110000. Its totient is φ = 912109998.

The previous prime is 912109981. The next prime is 912110041. The reversal of 912109999 is 999901219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 912109999 - 2⁵ = 912109967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (912109199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456054999 + 456055000.

It is an arithmetic number, because the mean of its divisors is an integer number (456055000).

Almost surely, 2^912109999 is an apocalyptic number.

912109999 is a deficient number, since it is larger than the sum of its proper divisors (1).

912109999 is an equidigital number, since it uses as much as digits as its factorization.

912109999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 49.

The square root of 912109999 is about 30201.1589016051. The cubic root of 912109999 is about 969.8005041960.

The spelling of 912109999 in words is "nine hundred twelve million, one hundred nine thousand, nine hundred ninety-nine".