1423357665 has 32 divisors (see below), whose sum is σ = 2326423680. Its totient is φ = 742849536.

The previous prime is 1423357633. The next prime is 1423357709. The reversal of 1423357665 is 5667533241.

It is not a de Polignac number, because 1423357665 - 2⁵ = 1423357633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330969 + ... + 335241.

It is an arithmetic number, because the mean of its divisors is an integer number (72700740).

Almost surely, 2^1423357665 is an apocalyptic number.

1423357665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1423357665 is a deficient number, since it is larger than the sum of its proper divisors (903066015).

1423357665 is a wasteful number, since it uses less digits than its factorization.

1423357665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753.

The product of its digits is 453600, while the sum is 42.

The square root of 1423357665 is about 37727.4126465094. The cubic root of 1423357665 is about 1124.8760791899.

The spelling of 1423357665 in words is "one billion, four hundred twenty-three million, three hundred fifty-seven thousand, six hundred sixty-five".