400505103 has 6 divisors (see below), whose sum is σ = 578507384. Its totient is φ = 267003396.

The previous prime is 400505099. The next prime is 400505111. The reversal of 400505103 is 301505004.

It is not a de Polignac number, because 400505103 - 2² = 400505099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400506103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22250275 + ... + 22250292.

Almost surely, 2^400505103 is an apocalyptic number.

400505103 is a deficient number, since it is larger than the sum of its proper divisors (178002281).

400505103 is a wasteful number, since it uses less digits than its factorization.

400505103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44500573 (or 44500570 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 400505103 is about 20012.6235911237. The cubic root of 400505103 is about 737.1163051711.

Subtracting from 400505103 its reverse (301505004), we obtain a palindrome (99000099).

The spelling of 400505103 in words is "four hundred million, five hundred five thousand, one hundred three".