1123640139 has 16 divisors (see below), whose sum is σ = 1548513792. Its totient is φ = 724314528.

The previous prime is 1123640123. The next prime is 1123640153. The reversal of 1123640139 is 9310463211.

1123640139 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1123640139 - 2⁴ = 1123640123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123640339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36304 + ... + 59709.

It is an arithmetic number, because the mean of its divisors is an integer number (96782112).

Almost surely, 2^1123640139 is an apocalyptic number.

1123640139 is a deficient number, since it is larger than the sum of its proper divisors (424873653).

1123640139 is an equidigital number, since it uses as much as digits as its factorization.

1123640139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96146.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1123640139 is about 33520.7419219802. The cubic root of 1123640139 is about 1039.6226870299.

The spelling of 1123640139 in words is "one billion, one hundred twenty-three million, six hundred forty thousand, one hundred thirty-nine".