409397 has 2 divisors, whose sum is σ = 409398. Its totient is φ = 409396.

The previous prime is 409391. The next prime is 409429. The reversal of 409397 is 793904.

It is a happy number.

It is an a-pointer prime, because the next prime (409429) can be obtained adding 409397 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398161 + 11236 = 631^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 409397 - 2⁶ = 409333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204698 + 204699.

It is an arithmetic number, because the mean of its divisors is an integer number (204699).

2⁴⁰⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

409397 is a deficient number, since it is larger than the sum of its proper divisors (1).

409397 is an equidigital number, since it uses as much as digits as its factorization.

409397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 409397 is about 639.8413865951. The cubic root of 409397 is about 74.2531505274.

The spelling of 409397 in words is "four hundred nine thousand, three hundred ninety-seven".