427995823 has 2 divisors, whose sum is σ = 427995824. Its totient is φ = 427995822.

The previous prime is 427995817. The next prime is 427995839. The reversal of 427995823 is 328599724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427995823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427995863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213997911 + 213997912.

It is an arithmetic number, because the mean of its divisors is an integer number (213997912).

Almost surely, 2^427995823 is an apocalyptic number.

427995823 is a deficient number, since it is larger than the sum of its proper divisors (1).

427995823 is an equidigital number, since it uses as much as digits as its factorization.

427995823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 427995823 is about 20688.0599138730. The cubic root of 427995823 is about 753.6097527439.

The spelling of 427995823 in words is "four hundred twenty-seven million, nine hundred ninety-five thousand, eight hundred twenty-three".