406239073 has 2 divisors, whose sum is σ = 406239074. Its totient is φ = 406239072.

The previous prime is 406239049. The next prime is 406239079. The reversal of 406239073 is 370932604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387774864 + 18464209 = 19692^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 406239073 - 2²¹ = 404141921 is a prime.

It is not a weakly prime, because it can be changed into another prime (406239079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203119536 + 203119537.

It is an arithmetic number, because the mean of its divisors is an integer number (203119537).

Almost surely, 2^406239073 is an apocalyptic number.

It is an amenable number.

406239073 is a deficient number, since it is larger than the sum of its proper divisors (1).

406239073 is an equidigital number, since it uses as much as digits as its factorization.

406239073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 406239073 is about 20155.3733034147. The cubic root of 406239073 is about 740.6173767973.

The spelling of 406239073 in words is "four hundred six million, two hundred thirty-nine thousand, seventy-three".