423965 has 4 divisors (see below), whose sum is σ = 508764. Its totient is φ = 339168.

The previous prime is 423961. The next prime is 423977. The reversal of 423965 is 569324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284089 + 139876 = 533^2 + 374^2 .

It is a cyclic number.

It is not a de Polignac number, because 423965 - 2² = 423961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423961) 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, 42392 + ... + 42401.

It is an arithmetic number, because the mean of its divisors is an integer number (127191).

2⁴²³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

423965 is a deficient number, since it is larger than the sum of its proper divisors (84799).

423965 is an equidigital number, since it uses as much as digits as its factorization.

423965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84798.

The product of its digits is 6480, while the sum is 29.

The square root of 423965 is about 651.1259478780. The cubic root of 423965 is about 75.1236478892.

The spelling of 423965 in words is "four hundred twenty-three thousand, nine hundred sixty-five".