1181380049 has 4 divisors (see below), whose sum is σ = 1181969520. Its totient is φ = 1180790580.

The previous prime is 1181380009. The next prime is 1181380061. The reversal of 1181380049 is 9400831811.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1181380049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181380009) 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, 291719 + ... + 295740.

It is an arithmetic number, because the mean of its divisors is an integer number (295492380).

Almost surely, 2^1181380049 is an apocalyptic number.

It is an amenable number.

1181380049 is a deficient number, since it is larger than the sum of its proper divisors (589471).

1181380049 is an equidigital number, since it uses as much as digits as its factorization.

1181380049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589470.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1181380049 is about 34371.2095946593. The cubic root of 1181380049 is about 1057.1336017895.

The spelling of 1181380049 in words is "one billion, one hundred eighty-one million, three hundred eighty thousand, forty-nine".