1131921359 has 4 divisors (see below), whose sum is σ = 1170953160. Its totient is φ = 1092889560.

The previous prime is 1131921347. The next prime is 1131921403. The reversal of 1131921359 is 9531291311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9531291311 = 61343 ⋅155377.

It is a cyclic number.

It is not a de Polignac number, because 1131921359 - 2¹² = 1131917263 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 (1131921059) 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, 19515857 + ... + 19515914.

It is an arithmetic number, because the mean of its divisors is an integer number (292738290).

Almost surely, 2^1131921359 is an apocalyptic number.

1131921359 is a deficient number, since it is larger than the sum of its proper divisors (39031801).

1131921359 is an equidigital number, since it uses as much as digits as its factorization.

1131921359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39031800.

The product of its digits is 7290, while the sum is 35.

The square root of 1131921359 is about 33644.0389816681. The cubic root of 1131921359 is about 1042.1704422517.

The spelling of 1131921359 in words is "one billion, one hundred thirty-one million, nine hundred twenty-one thousand, three hundred fifty-nine".