1092751981 has 4 divisors (see below), whose sum is σ = 1096697212. Its totient is φ = 1088806752.

The previous prime is 1092751973. The next prime is 1092751999. The reversal of 1092751981 is 1891572901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 648975625 + 443776356 = 25475^2 + 21066^2 .

It is a cyclic number.

It is not a de Polignac number, because 1092751981 - 2³ = 1092751973 is a prime.

It is a super-2 number, since 2×1092751981² = 2388213783958848722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1092751901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972200 + ... + 1972753.

It is an arithmetic number, because the mean of its divisors is an integer number (274174303).

Almost surely, 2^1092751981 is an apocalyptic number.

It is an amenable number.

1092751981 is a deficient number, since it is larger than the sum of its proper divisors (3945231).

1092751981 is an equidigital number, since it uses as much as digits as its factorization.

1092751981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945230.

The product of its (nonzero) digits is 45360, while the sum is 43.

The square root of 1092751981 is about 33056.7993157232. The cubic root of 1092751981 is about 1030.0078489363.

The spelling of 1092751981 in words is "one billion, ninety-two million, seven hundred fifty-one thousand, nine hundred eighty-one".