401923 has 4 divisors (see below), whose sum is σ = 411768. Its totient is φ = 392080.

The previous prime is 401917. The next prime is 401939. The reversal of 401923 is 329104.

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

It is a cyclic number.

It is not a de Polignac number, because 401923 - 2⁹ = 401411 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401923.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401903) 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, 4861 + ... + 4942.

It is an arithmetic number, because the mean of its divisors is an integer number (102942).

2⁴⁰¹⁹²³ is an apocalyptic number.

401923 is a deficient number, since it is larger than the sum of its proper divisors (9845).

401923 is an equidigital number, since it uses as much as digits as its factorization.

401923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9844.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 401923 is about 633.9739742292. The cubic root of 401923 is about 73.7985144738.

The spelling of 401923 in words is "four hundred one thousand, nine hundred twenty-three".