1912108481 has 4 divisors (see below), whose sum is σ = 1914806100. Its totient is φ = 1909410864.

The previous prime is 1912108447. The next prime is 1912108493. The reversal of 1912108481 is 1848012191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1848012191 = 8731 ⋅211661.

It can be written as a sum of positive squares in 2 ways, for example, as 467424400 + 1444684081 = 21620^2 + 38009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1912108481 is a prime.

It is a super-2 number, since 2×1912108481² = 7312317686224254722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1912108421) 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, 1347746 + ... + 1349163.

It is an arithmetic number, because the mean of its divisors is an integer number (478701525).

Almost surely, 2^1912108481 is an apocalyptic number.

It is an amenable number.

1912108481 is a deficient number, since it is larger than the sum of its proper divisors (2697619).

1912108481 is an equidigital number, since it uses as much as digits as its factorization.

1912108481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697618.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1912108481 is about 43727.6626519186. The cubic root of 1912108481 is about 1241.1878318182.

The spelling of 1912108481 in words is "one billion, nine hundred twelve million, one hundred eight thousand, four hundred eighty-one".