8409397 has 4 divisors (see below), whose sum is σ = 8636716. Its totient is φ = 8182080.

The previous prime is 8409383. The next prime is 8409403. The reversal of 8409397 is 7939048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5447556 + 2961841 = 2334^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 8409397 - 2¹¹ = 8407349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113604 + ... + 113677.

It is an arithmetic number, because the mean of its divisors is an integer number (2159179).

Almost surely, 2^8409397 is an apocalyptic number.

It is an amenable number.

8409397 is a deficient number, since it is larger than the sum of its proper divisors (227319).

8409397 is a wasteful number, since it uses less digits than its factorization.

8409397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227318.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8409397 is about 2899.8960326191. The cubic root of 8409397 is about 203.3550453091.

The spelling of 8409397 in words is "eight million, four hundred nine thousand, three hundred ninety-seven".