1156989613 has 8 divisors (see below), whose sum is σ = 1248010400. Its totient is φ = 1066257648.

The previous prime is 1156989607. The next prime is 1156989637. The reversal of 1156989613 is 3169896511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156989613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156989653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63843 + ... + 79936.

It is an arithmetic number, because the mean of its divisors is an integer number (156001300).

Almost surely, 2^1156989613 is an apocalyptic number.

1156989613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1156989613 is a deficient number, since it is larger than the sum of its proper divisors (91020787).

1156989613 is a wasteful number, since it uses less digits than its factorization.

1156989613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144411.

The product of its digits is 349920, while the sum is 49.

The square root of 1156989613 is about 34014.5500190727. The cubic root of 1156989613 is about 1049.8078599293.

The spelling of 1156989613 in words is "one billion, one hundred fifty-six million, nine hundred eighty-nine thousand, six hundred thirteen".