912091930 has 32 divisors (see below), whose sum is σ = 1679135184. Its totient is φ = 356622336.

The previous prime is 912091907. The next prime is 912091931. The reversal of 912091930 is 39190219.

It can be written as a sum of positive squares in 8 ways, for example, as 57289761 + 854802169 = 7569^2 + 29237^2 .

It is a super-2 number, since 2×912091930² = 1663823377542249800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (912091931) 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 15 ways as a sum of consecutive naturals, for example, 76962 + ... + 88018.

Almost surely, 2^912091930 is an apocalyptic number.

912091930 is a deficient number, since it is larger than the sum of its proper divisors (767043254).

912091930 is a wasteful number, since it uses less digits than its factorization.

912091930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11250.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 912091930 is about 30200.8597559738. The cubic root of 912091930 is about 969.7941002020.

It can be divided in two parts, 91209 and 1930, that added together give a palindrome (93139).

The spelling of 912091930 in words is "nine hundred twelve million, ninety-one thousand, nine hundred thirty".