1158031943 has 4 divisors (see below), whose sum is σ = 1160410320. Its totient is φ = 1155653568.

The previous prime is 1158031913. The next prime is 1158031949. The reversal of 1158031943 is 3491308511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3491308511 = 101 ⋅34567411.

It is a cyclic number.

It is not a de Polignac number, because 1158031943 - 2¹⁸ = 1157769799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158031949) 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, 1188458 + ... + 1189431.

It is an arithmetic number, because the mean of its divisors is an integer number (290102580).

Almost surely, 2^1158031943 is an apocalyptic number.

1158031943 is a deficient number, since it is larger than the sum of its proper divisors (2378377).

1158031943 is an equidigital number, since it uses as much as digits as its factorization.

1158031943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378376.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1158031943 is about 34029.8683952789. The cubic root of 1158031943 is about 1050.1230220181.

The spelling of 1158031943 in words is "one billion, one hundred fifty-eight million, thirty-one thousand, nine hundred forty-three".