154939 has 4 divisors (see below), whose sum is σ = 158760. Its totient is φ = 151120.

The previous prime is 154937. The next prime is 154943. The reversal of 154939 is 939451.

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 154939 - 2¹ = 154937 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154939.

It is not an unprimeable number, because it can be changed into a prime (154933) 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 in 3 ways as a sum of consecutive naturals, for example, 1849 + ... + 1930.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2¹⁵⁴⁹³⁹ is an apocalyptic number.

154939 is a deficient number, since it is larger than the sum of its proper divisors (3821).

154939 is an equidigital number, since it uses as much as digits as its factorization.

154939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820.

The product of its digits is 4860, while the sum is 31.

The square root of 154939 is about 393.6229159996. The cubic root of 154939 is about 53.7098058978.

The spelling of 154939 in words is "one hundred fifty-four thousand, nine hundred thirty-nine".