1100983261 has 4 divisors (see below), whose sum is σ = 1258266592. Its totient is φ = 943699932.

The previous prime is 1100983243. The next prime is 1100983267. The reversal of 1100983261 is 1623890011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1623890011 = 313 ⋅5188147.

It is not a de Polignac number, because 1100983261 - 2⁹ = 1100982749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100983267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78641655 + ... + 78641668.

It is an arithmetic number, because the mean of its divisors is an integer number (314566648).

Almost surely, 2^1100983261 is an apocalyptic number.

It is an amenable number.

1100983261 is a deficient number, since it is larger than the sum of its proper divisors (157283331).

1100983261 is an equidigital number, since it uses as much as digits as its factorization.

1100983261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157283330.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1100983261 is about 33181.0678098219. The cubic root of 1100983261 is about 1032.5875998507.

The spelling of 1100983261 in words is "one billion, one hundred million, nine hundred eighty-three thousand, two hundred sixty-one".