1149309131 has 4 divisors (see below), whose sum is σ = 1151097192. Its totient is φ = 1147521072.

The previous prime is 1149309127. The next prime is 1149309137. The reversal of 1149309131 is 1319039411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1319039411 = 109 ⋅12101279.

It is a cyclic number.

It is not a de Polignac number, because 1149309131 - 2² = 1149309127 is a prime.

It is a super-2 number, since 2×1149309131² = 2641822957199950322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1149309137) 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, 893066 + ... + 894351.

It is an arithmetic number, because the mean of its divisors is an integer number (287774298).

Almost surely, 2^1149309131 is an apocalyptic number.

1149309131 is a deficient number, since it is larger than the sum of its proper divisors (1788061).

1149309131 is an equidigital number, since it uses as much as digits as its factorization.

1149309131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788060.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1149309131 is about 33901.4620776155. The cubic root of 1149309131 is about 1047.4797093375.

The spelling of 1149309131 in words is "one billion, one hundred forty-nine million, three hundred nine thousand, one hundred thirty-one".