400304053 has 2 divisors, whose sum is σ = 400304054. Its totient is φ = 400304052.

The previous prime is 400304017. The next prime is 400304077. The reversal of 400304053 is 350403004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266277124 + 134026929 = 16318^2 + 11577^2 .

It is a cyclic number.

It is not a de Polignac number, because 400304053 - 2²¹ = 398206901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400304053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400302053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200152026 + 200152027.

It is an arithmetic number, because the mean of its divisors is an integer number (200152027).

Almost surely, 2^400304053 is an apocalyptic number.

It is an amenable number.

400304053 is a deficient number, since it is larger than the sum of its proper divisors (1).

400304053 is an equidigital number, since it uses as much as digits as its factorization.

400304053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 400304053 is about 20007.5998810452. The cubic root of 400304053 is about 736.9929425832.

Adding to 400304053 its reverse (350403004), we get a palindrome (750707057).

The spelling of 400304053 in words is "four hundred million, three hundred four thousand, fifty-three".