1081963945 has 4 divisors (see below), whose sum is σ = 1298356740. Its totient is φ = 865571152.

The previous prime is 1081963937. The next prime is 1081963951. The reversal of 1081963945 is 5493691801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5493691801 = 13 ⋅422591677.

It can be written as a sum of positive squares in 2 ways, for example, as 483868009 + 598095936 = 21997^2 + 24456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081963945 - 2³ = 1081963937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1081963895 and 1081963904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108196390 + ... + 108196399.

It is an arithmetic number, because the mean of its divisors is an integer number (324589185).

Almost surely, 2^1081963945 is an apocalyptic number.

It is an amenable number.

1081963945 is a deficient number, since it is larger than the sum of its proper divisors (216392795).

1081963945 is an equidigital number, since it uses as much as digits as its factorization.

1081963945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216392794.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1081963945 is about 32893.2203500965. The cubic root of 1081963945 is about 1026.6070985823.

The spelling of 1081963945 in words is "one billion, eighty-one million, nine hundred sixty-three thousand, nine hundred forty-five".