734639 has 4 divisors (see below), whose sum is σ = 737640. Its totient is φ = 731640.

The previous prime is 734627. The next prime is 734647. The reversal of 734639 is 936437.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-734639 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 (734659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097 + ... + 1634.

It is an arithmetic number, because the mean of its divisors is an integer number (184410).

2⁷³⁴⁶³⁹ is an apocalyptic number.

734639 is a deficient number, since it is larger than the sum of its proper divisors (3001).

734639 is a wasteful number, since it uses less digits than its factorization.

734639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000.

The product of its digits is 13608, while the sum is 32.

The square root of 734639 is about 857.1108446403. The cubic root of 734639 is about 90.2314618298.

The spelling of 734639 in words is "seven hundred thirty-four thousand, six hundred thirty-nine".