1156608539 has 4 divisors (see below), whose sum is σ = 1183506456. Its totient is φ = 1129710624.

The previous prime is 1156608533. The next prime is 1156608547. The reversal of 1156608539 is 9358066511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9358066511 = 23 ⋅406872457.

It is a cyclic number.

It is not a de Polignac number, because 1156608539 - 2¹² = 1156604443 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 1156608539.

It is not an unprimeable number, because it can be changed into a prime (1156608533) 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, 13448894 + ... + 13448979.

It is an arithmetic number, because the mean of its divisors is an integer number (295876614).

Almost surely, 2^1156608539 is an apocalyptic number.

1156608539 is a deficient number, since it is larger than the sum of its proper divisors (26897917).

1156608539 is an equidigital number, since it uses as much as digits as its factorization.

1156608539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26897916.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1156608539 is about 34008.9479255093. The cubic root of 1156608539 is about 1049.6925899777.

The spelling of 1156608539 in words is "one billion, one hundred fifty-six million, six hundred eight thousand, five hundred thirty-nine".