400319 has 4 divisors (see below), whose sum is σ = 404544. Its totient is φ = 396096.

The previous prime is 400313. The next prime is 400321. The reversal of 400319 is 913004.

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 400319 - 2¹⁶ = 334783 is a prime.

It is a super-2 number, since 2×400319² = 320510603522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400297 and 400306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (101136).

2⁴⁰⁰³¹⁹ is an apocalyptic number.

400319 is a deficient number, since it is larger than the sum of its proper divisors (4225).

400319 is an equidigital number, since it uses as much as digits as its factorization.

400319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 400319 is about 632.7076734164. The cubic root of 400319 is about 73.7002115358.

The spelling of 400319 in words is "four hundred thousand, three hundred nineteen".