1611434243 has 4 divisors (see below), whose sum is σ = 1615825440. Its totient is φ = 1607043048.

The previous prime is 1611434221. The next prime is 1611434261. The reversal of 1611434243 is 3424341161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3424341161 = 17 ⋅201431833.

It is a cyclic number.

It is not a de Polignac number, because 1611434243 - 2²⁴ = 1594657027 is a prime.

It is a super-3 number, since 3×1611434243³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611434203) 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, 2195048 + ... + 2195781.

It is an arithmetic number, because the mean of its divisors is an integer number (403956360).

Almost surely, 2^1611434243 is an apocalyptic number.

1611434243 is a deficient number, since it is larger than the sum of its proper divisors (4391197).

1611434243 is an equidigital number, since it uses as much as digits as its factorization.

1611434243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391196.

The product of its digits is 6912, while the sum is 29.

The square root of 1611434243 is about 40142.6735905819. The cubic root of 1611434243 is about 1172.3866452820.

The spelling of 1611434243 in words is "one billion, six hundred eleven million, four hundred thirty-four thousand, two hundred forty-three".