406278773 has 2 divisors, whose sum is σ = 406278774. Its totient is φ = 406278772.

The previous prime is 406278737. The next prime is 406278797. The reversal of 406278773 is 377872604.

Together with previous prime (406278737) 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., 381108484 + 25170289 = 19522^2 + 5017^2 .

It is a cyclic number.

It is not a de Polignac number, because 406278773 - 2⁶ = 406278709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406278713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203139386 + 203139387.

It is an arithmetic number, because the mean of its divisors is an integer number (203139387).

Almost surely, 2^406278773 is an apocalyptic number.

It is an amenable number.

406278773 is a deficient number, since it is larger than the sum of its proper divisors (1).

406278773 is an equidigital number, since it uses as much as digits as its factorization.

406278773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 406278773 is about 20156.3581283921. The cubic root of 406278773 is about 740.6415017966.

The spelling of 406278773 in words is "four hundred six million, two hundred seventy-eight thousand, seven hundred seventy-three".