400712003 has 4 divisors (see below), whose sum is σ = 418134288. Its totient is φ = 383289720.

The previous prime is 400711973. The next prime is 400712009. The reversal of 400712003 is 300217004.

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 400712003 - 2¹⁰ = 400710979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400712009) 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, 8711108 + ... + 8711153.

It is an arithmetic number, because the mean of its divisors is an integer number (104533572).

Almost surely, 2^400712003 is an apocalyptic number.

400712003 is a deficient number, since it is larger than the sum of its proper divisors (17422285).

400712003 is a wasteful number, since it uses less digits than its factorization.

400712003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17422284.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 400712003 is about 20017.7921609752. The cubic root of 400712003 is about 737.2432141734.

Adding to 400712003 its reverse (300217004), we get a palindrome (700929007).

The spelling of 400712003 in words is "four hundred million, seven hundred twelve thousand, three".