1423243681 has 4 divisors (see below), whose sum is σ = 1444486192. Its totient is φ = 1402001172.

The previous prime is 1423243673. The next prime is 1423243687. The reversal of 1423243681 is 1863423241.

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 1423243681 - 2³ = 1423243673 is a prime.

It is a super-2 number, since 2×1423243681² = 4051245151012859522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423243687) 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, 10621155 + ... + 10621288.

It is an arithmetic number, because the mean of its divisors is an integer number (361121548).

Almost surely, 2^1423243681 is an apocalyptic number.

It is an amenable number.

1423243681 is a deficient number, since it is larger than the sum of its proper divisors (21242511).

1423243681 is an equidigital number, since it uses as much as digits as its factorization.

1423243681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21242510.

The product of its digits is 27648, while the sum is 34.

The square root of 1423243681 is about 37725.9019905423. The cubic root of 1423243681 is about 1124.8460512963.

The spelling of 1423243681 in words is "one billion, four hundred twenty-three million, two hundred forty-three thousand, six hundred eighty-one".