154639 has 4 divisors (see below), whose sum is σ = 157320. Its totient is φ = 151960.

The previous prime is 154621. The next prime is 154643. The reversal of 154639 is 936451.

154639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 154639 - 2⁹ = 154127 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 (154619) 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, 1252 + ... + 1369.

It is an arithmetic number, because the mean of its divisors is an integer number (39330).

2¹⁵⁴⁶³⁹ is an apocalyptic number.

154639 is a deficient number, since it is larger than the sum of its proper divisors (2681).

154639 is an equidigital number, since it uses as much as digits as its factorization.

154639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680.

The product of its digits is 3240, while the sum is 28.

The square root of 154639 is about 393.2416559827. The cubic root of 154639 is about 53.6751183702.

The spelling of 154639 in words is "one hundred fifty-four thousand, six hundred thirty-nine".