1161423443 has 2 divisors, whose sum is σ = 1161423444. Its totient is φ = 1161423442.

The previous prime is 1161423427. The next prime is 1161423457. The reversal of 1161423443 is 3443241611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161423443 - 2⁴ = 1161423427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1161423143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580711721 + 580711722.

It is an arithmetic number, because the mean of its divisors is an integer number (580711722).

Almost surely, 2^1161423443 is an apocalyptic number.

1161423443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161423443 is an equidigital number, since it uses as much as digits as its factorization.

1161423443 is an evil number, because the sum of its binary digits is even.

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

The square root of 1161423443 is about 34079.6631878896. The cubic root of 1161423443 is about 1051.1471794483.

The spelling of 1161423443 in words is "one billion, one hundred sixty-one million, four hundred twenty-three thousand, four hundred forty-three".