423957 has 4 divisors (see below), whose sum is σ = 565280. Its totient is φ = 282636.

The previous prime is 423949. The next prime is 423961. The reversal of 423957 is 759324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 423957 - 2³ = 423949 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423957.

It is not an unprimeable number, because it can be changed into a prime (423977) 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, 70657 + ... + 70662.

It is an arithmetic number, because the mean of its divisors is an integer number (141320).

2⁴²³⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

423957 is a deficient number, since it is larger than the sum of its proper divisors (141323).

423957 is a wasteful number, since it uses less digits than its factorization.

423957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141322.

The product of its digits is 7560, while the sum is 30.

The square root of 423957 is about 651.1198046443. The cubic root of 423957 is about 75.1231753714.

The spelling of 423957 in words is "four hundred twenty-three thousand, nine hundred fifty-seven".