409169897 has 8 divisors (see below), whose sum is σ = 425784480. Its totient is φ = 392878080.

The previous prime is 409169879. The next prime is 409169927. The reversal of 409169897 is 798961904.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 409169897 - 2⁸ = 409169641 is a prime.

It is a super-2 number, since 2×409169897² = 334840009221981218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409169297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78104 + ... + 83177.

It is an arithmetic number, because the mean of its divisors is an integer number (53223060).

Almost surely, 2^409169897 is an apocalyptic number.

It is an amenable number.

409169897 is a deficient number, since it is larger than the sum of its proper divisors (16614583).

409169897 is a wasteful number, since it uses less digits than its factorization.

409169897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161383.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 409169897 is about 20227.9484130250. The cubic root of 409169897 is about 742.3941794648.

The spelling of 409169897 in words is "four hundred nine million, one hundred sixty-nine thousand, eight hundred ninety-seven".