912668891 has 4 divisors (see below), whose sum is σ = 913018152. Its totient is φ = 912319632.

The previous prime is 912668879. The next prime is 912668903. The reversal of 912668891 is 198866219.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (912668879) and next prime (912668903).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-912668891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (912668821) 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 in 3 ways as a sum of consecutive naturals, for example, 170681 + ... + 175946.

It is an arithmetic number, because the mean of its divisors is an integer number (228254538).

Almost surely, 2^912668891 is an apocalyptic number.

912668891 is a deficient number, since it is larger than the sum of its proper divisors (349261).

912668891 is a wasteful number, since it uses less digits than its factorization.

912668891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349260.

The product of its digits is 373248, while the sum is 50.

The square root of 912668891 is about 30210.4103083689. The cubic root of 912668891 is about 969.9985442994.

The spelling of 912668891 in words is "nine hundred twelve million, six hundred sixty-eight thousand, eight hundred ninety-one".