400793 has 4 divisors (see below), whose sum is σ = 404580. Its totient is φ = 397008.

The previous prime is 400759. The next prime is 400823. The reversal of 400793 is 397004.

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 300304 + 100489 = 548^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 400793 - 2¹⁰ = 399769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400703) 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, 1730 + ... + 1947.

It is an arithmetic number, because the mean of its divisors is an integer number (101145).

2⁴⁰⁰⁷⁹³ is an apocalyptic number.

It is an amenable number.

400793 is a deficient number, since it is larger than the sum of its proper divisors (3787).

400793 is a wasteful number, since it uses less digits than its factorization.

400793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 400793 is about 633.0821431694. The cubic root of 400793 is about 73.7292884481.

Adding to 400793 its reverse (397004), we get a palindrome (797797).

The spelling of 400793 in words is "four hundred thousand, seven hundred ninety-three".