1000400273 has 2 divisors, whose sum is σ = 1000400274. Its totient is φ = 1000400272.

The previous prime is 1000400267. The next prime is 1000400321. The reversal of 1000400273 is 3720040001.

It is a happy number.

1000400273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 920333569 + 80066704 = 30337^2 + 8948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000400273 - 2⁴ = 1000400257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000400773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500200136 + 500200137.

It is an arithmetic number, because the mean of its divisors is an integer number (500200137).

Almost surely, 2^1000400273 is an apocalyptic number.

It is an amenable number.

1000400273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000400273 is an equidigital number, since it uses as much as digits as its factorization.

1000400273 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1000400273 is about 31629.1048403207. The cubic root of 1000400273 is about 1000.1334065352.

Adding to 1000400273 its reverse (3720040001), we get a palindrome (4720440274).

The spelling of 1000400273 in words is "one billion, four hundred thousand, two hundred seventy-three".