406538291 has 2 divisors, whose sum is σ = 406538292. Its totient is φ = 406538290.

The previous prime is 406538227. The next prime is 406538311. The reversal of 406538291 is 192835604.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406538291 - 2⁶ = 406538227 is a prime.

It is not a weakly prime, because it can be changed into another prime (406535291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203269145 + 203269146.

It is an arithmetic number, because the mean of its divisors is an integer number (203269146).

Almost surely, 2^406538291 is an apocalyptic number.

406538291 is a deficient number, since it is larger than the sum of its proper divisors (1).

406538291 is an equidigital number, since it uses as much as digits as its factorization.

406538291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 406538291 is about 20162.7947219625. The cubic root of 406538291 is about 740.7991676677.

The spelling of 406538291 in words is "four hundred six million, five hundred thirty-eight thousand, two hundred ninety-one".