1183638061 has 4 divisors (see below), whose sum is σ = 1212507324. Its totient is φ = 1154768800.

The previous prime is 1183638059. The next prime is 1183638139. The reversal of 1183638061 is 1608363811.

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 309548836 + 874089225 = 17594^2 + 29565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1183638061 - 2¹ = 1183638059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1183638061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1183638361) 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, 14434570 + ... + 14434651.

It is an arithmetic number, because the mean of its divisors is an integer number (303126831).

Almost surely, 2^1183638061 is an apocalyptic number.

It is an amenable number.

1183638061 is a deficient number, since it is larger than the sum of its proper divisors (28869263).

1183638061 is an equidigital number, since it uses as much as digits as its factorization.

1183638061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28869262.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1183638061 is about 34404.0413469116. The cubic root of 1183638061 is about 1057.8066849844.

The spelling of 1183638061 in words is "one billion, one hundred eighty-three million, six hundred thirty-eight thousand, sixty-one".