406397169 has 20 divisors (see below), whose sum is σ = 610973044. Its totient is φ = 269197344.

The previous prime is 406397149. The next prime is 406397177. The reversal of 406397169 is 961793604.

406397169 is a `hidden beast` number, since 4 + 0 + 639 + 7 + 1 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 225360144 + 181037025 = 15012^2 + 13455^2 .

It is not a de Polignac number, because 406397169 - 2⁹ = 406396657 is a prime.

It is a super-2 number, since 2×406397169² = 330317317942429122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406397119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3262 + ... + 28695.

Almost surely, 2^406397169 is an apocalyptic number.

It is an amenable number.

406397169 is a deficient number, since it is larger than the sum of its proper divisors (204575875).

406397169 is a wasteful number, since it uses less digits than its factorization.

406397169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32126 (or 32117 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 406397169 is about 20159.2948537393. The cubic root of 406397169 is about 740.7134396551.

The spelling of 406397169 in words is "four hundred six million, three hundred ninety-seven thousand, one hundred sixty-nine".