1423661181 has 4 divisors (see below), whose sum is σ = 1898214912. Its totient is φ = 949107452.

The previous prime is 1423661171. The next prime is 1423661189. The reversal of 1423661181 is 1811663241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1423661181 - 2⁷ = 1423661053 is a prime.

It is a super-2 number, since 2×1423661181² = 4053622316572629522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423661189) 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, 237276861 + ... + 237276866.

It is an arithmetic number, because the mean of its divisors is an integer number (474553728).

Almost surely, 2^1423661181 is an apocalyptic number.

It is an amenable number.

1423661181 is a deficient number, since it is larger than the sum of its proper divisors (474553731).

1423661181 is an equidigital number, since it uses as much as digits as its factorization.

1423661181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474553730.

The product of its digits is 6912, while the sum is 33.

The square root of 1423661181 is about 37731.4349183807. The cubic root of 1423661181 is about 1124.9560294913.

The spelling of 1423661181 in words is "one billion, four hundred twenty-three million, six hundred sixty-one thousand, one hundred eighty-one".