409916173 has 2 divisors, whose sum is σ = 409916174. Its totient is φ = 409916172.

The previous prime is 409916137. The next prime is 409916197. The reversal of 409916173 is 371619904.

Together with previous prime (409916137) 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., 252237924 + 157678249 = 15882^2 + 12557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409916173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409916473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204958086 + 204958087.

It is an arithmetic number, because the mean of its divisors is an integer number (204958087).

Almost surely, 2^409916173 is an apocalyptic number.

It is an amenable number.

409916173 is a deficient number, since it is larger than the sum of its proper divisors (1).

409916173 is an equidigital number, since it uses as much as digits as its factorization.

409916173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 409916173 is about 20246.3866652793. The cubic root of 409916173 is about 742.8452508293.

The spelling of 409916173 in words is "four hundred nine million, nine hundred sixteen thousand, one hundred seventy-three".