912189381 has 8 divisors (see below), whose sum is σ = 1216525440. Its totient is φ = 607989792.

The previous prime is 912189347. The next prime is 912189419. The reversal of 912189381 is 183981219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 912189381 - 2¹⁰ = 912188357 is a prime.

It is a super-2 number, since 2×912189381² = 1664178933618326322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912189581) 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 in 7 ways as a sum of consecutive naturals, for example, 17341 + ... + 46098.

It is an arithmetic number, because the mean of its divisors is an integer number (152065680).

Almost surely, 2^912189381 is an apocalyptic number.

It is an amenable number.

912189381 is a deficient number, since it is larger than the sum of its proper divisors (304336059).

912189381 is a wasteful number, since it uses less digits than its factorization.

912189381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68235.

The product of its digits is 31104, while the sum is 42.

The square root of 912189381 is about 30202.4730941027. The cubic root of 912189381 is about 969.8286376706.

The spelling of 912189381 in words is "nine hundred twelve million, one hundred eighty-nine thousand, three hundred eighty-one".