406628197 has 2 divisors, whose sum is σ = 406628198. Its totient is φ = 406628196.

The previous prime is 406628179. The next prime is 406628203. The reversal of 406628197 is 791826604.

Together with previous prime (406628179) 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., 210656196 + 195972001 = 14514^2 + 13999^2 .

It is a cyclic number.

It is not a de Polignac number, because 406628197 - 2⁷ = 406628069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406628107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203314098 + 203314099.

It is an arithmetic number, because the mean of its divisors is an integer number (203314099).

Almost surely, 2^406628197 is an apocalyptic number.

It is an amenable number.

406628197 is a deficient number, since it is larger than the sum of its proper divisors (1).

406628197 is an equidigital number, since it uses as much as digits as its factorization.

406628197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 406628197 is about 20165.0241011510. The cubic root of 406628197 is about 740.8537729225.

The spelling of 406628197 in words is "four hundred six million, six hundred twenty-eight thousand, one hundred ninety-seven".