1090781941 has 4 divisors (see below), whose sum is σ = 1120262572. Its totient is φ = 1061301312.

The previous prime is 1090781893. The next prime is 1090781947. The reversal of 1090781941 is 1491870901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1491870901 = 109 ⋅13686889.

It can be written as a sum of positive squares in 2 ways, for example, as 501312100 + 589469841 = 22390^2 + 24279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090781941 - 2¹⁹ = 1090257653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1090781894 and 1090781903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090781947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14740260 + ... + 14740333.

It is an arithmetic number, because the mean of its divisors is an integer number (280065643).

Almost surely, 2^1090781941 is an apocalyptic number.

It is an amenable number.

1090781941 is a deficient number, since it is larger than the sum of its proper divisors (29480631).

1090781941 is an equidigital number, since it uses as much as digits as its factorization.

1090781941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29480630.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1090781941 is about 33026.9880703645. The cubic root of 1090781941 is about 1029.3885021479.

The spelling of 1090781941 in words is "one billion, ninety million, seven hundred eighty-one thousand, nine hundred forty-one".