400654613 has 4 divisors (see below), whose sum is σ = 408214188. Its totient is φ = 393095040.

The previous prime is 400654609. The next prime is 400654619. The reversal of 400654613 is 316456004.

It is a happy number.

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 235223569 + 165431044 = 15337^2 + 12862^2 .

It is a cyclic number.

It is not a de Polignac number, because 400654613 - 2² = 400654609 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 (400654619) 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, 3779708 + ... + 3779813.

It is an arithmetic number, because the mean of its divisors is an integer number (102053547).

Almost surely, 2^400654613 is an apocalyptic number.

It is an amenable number.

400654613 is a deficient number, since it is larger than the sum of its proper divisors (7559575).

400654613 is an equidigital number, since it uses as much as digits as its factorization.

400654613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7559574.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400654613 is about 20016.3586348766. The cubic root of 400654613 is about 737.2080164854.

The spelling of 400654613 in words is "four hundred million, six hundred fifty-four thousand, six hundred thirteen".