1423576985 has 4 divisors (see below), whose sum is σ = 1708292388. Its totient is φ = 1138861584.

The previous prime is 1423576981. The next prime is 1423576997. The reversal of 1423576985 is 5896753241.

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: 5896753241 = 113 ⋅52183657.

It can be written as a sum of positive squares in 2 ways, for example, as 424195216 + 999381769 = 20596^2 + 31613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423576985 - 2² = 1423576981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423576981) 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, 142357694 + ... + 142357703.

It is an arithmetic number, because the mean of its divisors is an integer number (427073097).

Almost surely, 2^1423576985 is an apocalyptic number.

It is an amenable number.

1423576985 is a deficient number, since it is larger than the sum of its proper divisors (284715403).

1423576985 is an equidigital number, since it uses as much as digits as its factorization.

1423576985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284715402.

The product of its digits is 1814400, while the sum is 50.

The square root of 1423576985 is about 37730.3191743722. The cubic root of 1423576985 is about 1124.9338522424.

The spelling of 1423576985 in words is "one billion, four hundred twenty-three million, five hundred seventy-six thousand, nine hundred eighty-five".