1608634 has 4 divisors (see below), whose sum is σ = 2412954. Its totient is φ = 804316.

The previous prime is 1608617. The next prime is 1608637. The reversal of 1608634 is 4368061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4368061 = 107 ⋅40823.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 558009 = 1025^2 + 747^2 .

It is not an unprimeable number, because it can be changed into a prime (1608637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402157 + ... + 402160.

2^1608634 is an apocalyptic number.

1608634 is a deficient number, since it is larger than the sum of its proper divisors (804320).

1608634 is an equidigital number, since it uses as much as digits as its factorization.

1608634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804319.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1608634 is about 1268.3193604136. The cubic root of 1608634 is about 117.1707153086.

The spelling of 1608634 in words is "one million, six hundred eight thousand, six hundred thirty-four".