400003363 has 4 divisors (see below), whose sum is σ = 400669528. Its totient is φ = 399337200.

The previous prime is 400003309. The next prime is 400003367. The reversal of 400003363 is 363300004.

It is a happy number.

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 400003363 - 2²¹ = 397906211 is a prime.

It is a super-2 number, since 2×400003363² = 320005380822619538, which contains 22 as substring.

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 400003363.

It is not an unprimeable number, because it can be changed into a prime (400003367) 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, 332181 + ... + 333382.

It is an arithmetic number, because the mean of its divisors is an integer number (100167382).

Almost surely, 2^400003363 is an apocalyptic number.

400003363 is a deficient number, since it is larger than the sum of its proper divisors (666165).

400003363 is an equidigital number, since it uses as much as digits as its factorization.

400003363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666164.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 400003363 is about 20000.0840748233. The cubic root of 400003363 is about 736.8083646219.

Adding to 400003363 its reverse (363300004), we get a palindrome (763303367).

The spelling of 400003363 in words is "four hundred million, three thousand, three hundred sixty-three".