1123638377 has 4 divisors (see below), whose sum is σ = 1123706256. Its totient is φ = 1123570500.

The previous prime is 1123638323. The next prime is 1123638391. The reversal of 1123638377 is 7738363211.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1123638377 - 2¹⁰ = 1123637353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123638077) 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, 9002 + ... + 48252.

It is an arithmetic number, because the mean of its divisors is an integer number (280926564).

Almost surely, 2^1123638377 is an apocalyptic number.

It is an amenable number.

1123638377 is a deficient number, since it is larger than the sum of its proper divisors (67879).

1123638377 is an equidigital number, since it uses as much as digits as its factorization.

1123638377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67878.

The product of its digits is 127008, while the sum is 41.

The square root of 1123638377 is about 33520.7156397354. The cubic root of 1123638377 is about 1039.6221436127.

The spelling of 1123638377 in words is "one billion, one hundred twenty-three million, six hundred thirty-eight thousand, three hundred seventy-seven".