1608397 has 4 divisors (see below), whose sum is σ = 1838176. Its totient is φ = 1378620.

The previous prime is 1608379. The next prime is 1608401. The reversal of 1608397 is 7938061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1608397 - 2¹¹ = 1606349 is a prime.

It is a Duffinian number.

1608397 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608337) 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, 114879 + ... + 114892.

It is an arithmetic number, because the mean of its divisors is an integer number (459544).

2^1608397 is an apocalyptic number.

It is an amenable number.

1608397 is a deficient number, since it is larger than the sum of its proper divisors (229779).

1608397 is an equidigital number, since it uses as much as digits as its factorization.

1608397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229778.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1608397 is about 1268.2259262450. The cubic root of 1608397 is about 117.1649607733.

The spelling of 1608397 in words is "one million, six hundred eight thousand, three hundred ninety-seven".