400173 has 4 divisors (see below), whose sum is σ = 533568. Its totient is φ = 266780.

The previous prime is 400157. The next prime is 400187. The reversal of 400173 is 371004.

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 a cyclic number.

It is not a de Polignac number, because 400173 - 2⁴ = 400157 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400123) 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, 66693 + ... + 66698.

It is an arithmetic number, because the mean of its divisors is an integer number (133392).

2⁴⁰⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

400173 is a deficient number, since it is larger than the sum of its proper divisors (133395).

400173 is a wasteful number, since it uses less digits than its factorization.

400173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133394.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 400173 is about 632.5922857576. The cubic root of 400173 is about 73.6912507326.

Adding to 400173 its reverse (371004), we get a palindrome (771177).

The spelling of 400173 in words is "four hundred thousand, one hundred seventy-three", and thus it is an iban number.