1161065013 has 4 divisors (see below), whose sum is σ = 1548086688. Its totient is φ = 774043340.

The previous prime is 1161064991. The next prime is 1161065021. The reversal of 1161065013 is 3105601611.

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 not a de Polignac number, because 1161065013 - 2⁵ = 1161064981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161065023) 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, 193510833 + ... + 193510838.

It is an arithmetic number, because the mean of its divisors is an integer number (387021672).

Almost surely, 2^1161065013 is an apocalyptic number.

It is an amenable number.

1161065013 is a deficient number, since it is larger than the sum of its proper divisors (387021675).

1161065013 is an equidigital number, since it uses as much as digits as its factorization.

1161065013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387021674.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1161065013 is about 34074.4040740260. The cubic root of 1161065013 is about 1051.0390358737.

Adding to 1161065013 its reverse (3105601611), we get a palindrome (4266666624).

The spelling of 1161065013 in words is "one billion, one hundred sixty-one million, sixty-five thousand, thirteen".