406169173 has 2 divisors, whose sum is σ = 406169174. Its totient is φ = 406169172.

The previous prime is 406169147. The next prime is 406169221. The reversal of 406169173 is 371961604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211789809 + 194379364 = 14553^2 + 13942^2 .

It is a cyclic number.

It is not a de Polignac number, because 406169173 - 2²¹ = 404072021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406169773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203084586 + 203084587.

It is an arithmetic number, because the mean of its divisors is an integer number (203084587).

Almost surely, 2^406169173 is an apocalyptic number.

It is an amenable number.

406169173 is a deficient number, since it is larger than the sum of its proper divisors (1).

406169173 is an equidigital number, since it uses as much as digits as its factorization.

406169173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 406169173 is about 20153.6391999063. The cubic root of 406169173 is about 740.5748959630.

The spelling of 406169173 in words is "four hundred six million, one hundred sixty-nine thousand, one hundred seventy-three".