1123400359 has 4 divisors (see below), whose sum is σ = 1134981904. Its totient is φ = 1111818816.

The previous prime is 1123400357. The next prime is 1123400371. The reversal of 1123400359 is 9530043211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9530043211 = 13 ⋅733080247.

It is a cyclic number.

It is not a de Polignac number, because 1123400359 - 2¹ = 1123400357 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 (1123400353) 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, 5790627 + ... + 5790820.

It is an arithmetic number, because the mean of its divisors is an integer number (283745476).

Almost surely, 2^1123400359 is an apocalyptic number.

1123400359 is a deficient number, since it is larger than the sum of its proper divisors (11581545).

1123400359 is an equidigital number, since it uses as much as digits as its factorization.

1123400359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581544.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1123400359 is about 33517.1651396713. The cubic root of 1123400359 is about 1039.5487314240.

The spelling of 1123400359 in words is "one billion, one hundred twenty-three million, four hundred thousand, three hundred fifty-nine".