400046513 has 2 divisors, whose sum is σ = 400046514. Its totient is φ = 400046512.

The previous prime is 400046489. The next prime is 400046531. The reversal of 400046513 is 315640004.

It is a happy number.

Together with next prime (400046531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219869584 + 180176929 = 14828^2 + 13423^2 .

It is a cyclic number.

It is not a de Polignac number, because 400046513 - 2¹⁴ = 400030129 is a prime.

It is not a weakly prime, because it can be changed into another prime (400046573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200023256 + 200023257.

It is an arithmetic number, because the mean of its divisors is an integer number (200023257).

Almost surely, 2^400046513 is an apocalyptic number.

It is an amenable number.

400046513 is a deficient number, since it is larger than the sum of its proper divisors (1).

400046513 is an equidigital number, since it uses as much as digits as its factorization.

400046513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 400046513 is about 20001.1627911979. The cubic root of 400046513 is about 736.8348578474.

Adding to 400046513 its reverse (315640004), we get a palindrome (715686517).

The spelling of 400046513 in words is "four hundred million, forty-six thousand, five hundred thirteen".