1123880861 has 4 divisors (see below), whose sum is σ = 1127101500. Its totient is φ = 1120660224.

The previous prime is 1123880843. The next prime is 1123880867. The reversal of 1123880861 is 1680883211.

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 1010031961 + 113848900 = 31781^2 + 10670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123880861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123880867) 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, 1609796 + ... + 1610493.

It is an arithmetic number, because the mean of its divisors is an integer number (281775375).

Almost surely, 2^1123880861 is an apocalyptic number.

It is an amenable number.

1123880861 is a deficient number, since it is larger than the sum of its proper divisors (3220639).

1123880861 is an equidigital number, since it uses as much as digits as its factorization.

1123880861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220638.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1123880861 is about 33524.3323721741. The cubic root of 1123880861 is about 1039.6969225953.

The spelling of 1123880861 in words is "one billion, one hundred twenty-three million, eight hundred eighty thousand, eight hundred sixty-one".