1981092707 has 6 divisors (see below), whose sum is σ = 2177564844. Its totient is φ = 1800993260.

The previous prime is 1981092691. The next prime is 1981092713. The reversal of 1981092707 is 7072901891.

It is not a de Polignac number, because 1981092707 - 2⁴ = 1981092691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981092007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8186213 + ... + 8186454.

It is an arithmetic number, because the mean of its divisors is an integer number (362927474).

Almost surely, 2^1981092707 is an apocalyptic number.

1981092707 is a deficient number, since it is larger than the sum of its proper divisors (196472137).

1981092707 is a wasteful number, since it uses less digits than its factorization.

1981092707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16372689 (or 16372678 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 1981092707 is about 44509.4676108353. The cubic root of 1981092707 is about 1255.9381898109.

The spelling of 1981092707 in words is "one billion, nine hundred eighty-one million, ninety-two thousand, seven hundred seven".