406205273 has 2 divisors, whose sum is σ = 406205274. Its totient is φ = 406205272.

The previous prime is 406205249. The next prime is 406205279. The reversal of 406205273 is 372502604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351637504 + 54567769 = 18752^2 + 7387^2 .

It is a cyclic number.

It is not a de Polignac number, because 406205273 - 2⁸ = 406205017 is a prime.

It is not a weakly prime, because it can be changed into another prime (406205279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203102636 + 203102637.

It is an arithmetic number, because the mean of its divisors is an integer number (203102637).

Almost surely, 2^406205273 is an apocalyptic number.

It is an amenable number.

406205273 is a deficient number, since it is larger than the sum of its proper divisors (1).

406205273 is an equidigital number, since it uses as much as digits as its factorization.

406205273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 406205273 is about 20154.5347998906. The cubic root of 406205273 is about 740.5968358865.

Adding to 406205273 its reverse (372502604), we get a palindrome (778707877).

The spelling of 406205273 in words is "four hundred six million, two hundred five thousand, two hundred seventy-three".