144787977 has 6 divisors (see below), whose sum is σ = 209138202. Its totient is φ = 96525312.

The previous prime is 144787969. The next prime is 144787987. The reversal of 144787977 is 779787441.

It can be written as a sum of positive squares in only one way, i.e., 141633801 + 3154176 = 11901^2 + 1776^2 .

It is not a de Polignac number, because 144787977 - 2³ = 144787969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144787927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8043768 + ... + 8043785.

It is an arithmetic number, because the mean of its divisors is an integer number (34856367).

Almost surely, 2^144787977 is an apocalyptic number.

It is an amenable number.

144787977 is a deficient number, since it is larger than the sum of its proper divisors (64350225).

144787977 is a wasteful number, since it uses less digits than its factorization.

144787977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16087559 (or 16087556 counting only the distinct ones).

The product of its digits is 2765952, while the sum is 54.

The square root of 144787977 is about 12032.7875822687. The cubic root of 144787977 is about 525.1025976357.

The spelling of 144787977 in words is "one hundred forty-four million, seven hundred eighty-seven thousand, nine hundred seventy-seven".