1140136409 has 4 divisors (see below), whose sum is σ = 1140234804. Its totient is φ = 1140038016.

The previous prime is 1140136391. The next prime is 1140136423. The reversal of 1140136409 is 9046310411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 278890000 + 861246409 = 16700^2 + 29347^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140136409 - 2¹² = 1140132313 is a prime.

It is a super-2 number, since 2×1140136409² = 2599822062254830562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140136429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29072 + ... + 55905.

It is an arithmetic number, because the mean of its divisors is an integer number (285058701).

Almost surely, 2^1140136409 is an apocalyptic number.

It is an amenable number.

1140136409 is a deficient number, since it is larger than the sum of its proper divisors (98395).

1140136409 is an equidigital number, since it uses as much as digits as its factorization.

1140136409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98394.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1140136409 is about 33765.9060147955. The cubic root of 1140136409 is about 1044.6855914861.

The spelling of 1140136409 in words is "one billion, one hundred forty million, one hundred thirty-six thousand, four hundred nine".