1132157989 has 4 divisors (see below), whose sum is σ = 1132248960. Its totient is φ = 1132067020.

The previous prime is 1132157981. The next prime is 1132158017. The reversal of 1132157989 is 9897512311.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9897512311 = 80429 ⋅123059.

It is a cyclic number.

It is not a de Polignac number, because 1132157989 - 2³ = 1132157981 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 (1132157981) 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, 23167 + ... + 52924.

It is an arithmetic number, because the mean of its divisors is an integer number (283062240).

Almost surely, 2^1132157989 is an apocalyptic number.

It is an amenable number.

1132157989 is a deficient number, since it is larger than the sum of its proper divisors (90971).

1132157989 is an equidigital number, since it uses as much as digits as its factorization.

1132157989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90970.

The product of its digits is 136080, while the sum is 46.

The square root of 1132157989 is about 33647.5554684140. Note that the first 3 decimals coincide. The cubic root of 1132157989 is about 1042.2430596667.

The spelling of 1132157989 in words is "one billion, one hundred thirty-two million, one hundred fifty-seven thousand, nine hundred eighty-nine".