1080965981 has 8 divisors (see below), whose sum is σ = 1119442680. Its totient is φ = 1042569472.

The previous prime is 1080965957. The next prime is 1080965999. The reversal of 1080965981 is 1895690801.

It can be written as a sum of positive squares in 4 ways, for example, as 25300900 + 1055665081 = 5030^2 + 32491^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1080965981 is a prime.

It is a super-2 number, since 2×1080965981² = 2336974904158584722, 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 (1080968981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8081 + ... + 47193.

It is an arithmetic number, because the mean of its divisors is an integer number (139930335).

Almost surely, 2^1080965981 is an apocalyptic number.

It is an amenable number.

1080965981 is a deficient number, since it is larger than the sum of its proper divisors (38476699).

1080965981 is an equidigital number, since it uses as much as digits as its factorization.

1080965981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40095.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 1080965981 is about 32878.0470983299. The cubic root of 1080965981 is about 1026.2913665332.

The spelling of 1080965981 in words is "one billion, eighty million, nine hundred sixty-five thousand, nine hundred eighty-one".