144978939 has 24 divisors (see below), whose sum is σ = 239645952. Its totient is φ = 82735920.

The previous prime is 144978931. The next prime is 144978991. The reversal of 144978939 is 939879441.

It is not a de Polignac number, because 144978939 - 2³ = 144978931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144978931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94432 + ... + 95954.

It is an arithmetic number, because the mean of its divisors is an integer number (9985248).

Almost surely, 2^144978939 is an apocalyptic number.

144978939 is a deficient number, since it is larger than the sum of its proper divisors (94667013).

144978939 is a wasteful number, since it uses less digits than its factorization.

144978939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047 (or 3044 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 144978939 is about 12040.7200366091. The cubic root of 144978939 is about 525.3333501983. Note that the first 4 decimals are identical.

It can be divided in two parts, 14497 and 8939, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 144978939 in words is "one hundred forty-four million, nine hundred seventy-eight thousand, nine hundred thirty-nine".