423969 has 16 divisors (see below), whose sum is σ = 696192. Its totient is φ = 223488.

The previous prime is 423961. The next prime is 423977. The reversal of 423969 is 969324.

423969 = 18² + 19² + ... + 108².

It is an interprime number because it is at equal distance from previous prime (423961) and next prime (423977).

It is not a de Polignac number, because 423969 - 2³ = 423961 is a prime.

It is a super-2 number, since 2×423969² = 359499425922, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 504 + ... + 1049.

It is an arithmetic number, because the mean of its divisors is an integer number (43512).

2⁴²³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

423969 is a deficient number, since it is larger than the sum of its proper divisors (272223).

423969 is a wasteful number, since it uses less digits than its factorization.

423969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

The product of its digits is 11664, while the sum is 33.

The square root of 423969 is about 651.1290194731. The cubic root of 423969 is about 75.1238841458.

The spelling of 423969 in words is "four hundred twenty-three thousand, nine hundred sixty-nine".