1423891065 has 32 divisors (see below), whose sum is σ = 2400289920. Its totient is φ = 718792704.

The previous prime is 1423891019. The next prime is 1423891067. The reversal of 1423891065 is 5601983241.

It is not a de Polignac number, because 1423891065 - 2¹⁷ = 1423759993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1423891067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573607 + ... + 576083.

It is an arithmetic number, because the mean of its divisors is an integer number (75009060).

Almost surely, 2^1423891065 is an apocalyptic number.

1423891065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1423891065 is a deficient number, since it is larger than the sum of its proper divisors (976398855).

1423891065 is a wasteful number, since it uses less digits than its factorization.

1423891065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1423891065 is about 37734.4811147576. The cubic root of 1423891065 is about 1125.0165765459.

The spelling of 1423891065 in words is "one billion, four hundred twenty-three million, eight hundred ninety-one thousand, sixty-five".