143945977 has 6 divisors (see below), whose sum is σ = 167447418. Its totient is φ = 123382224.

The previous prime is 143945959. The next prime is 143945981. The reversal of 143945977 is 779549341.

It can be written as a sum of positive squares in only one way, i.e., 121088016 + 22857961 = 11004^2 + 4781^2 .

It is not a de Polignac number, because 143945977 - 2⁷ = 143945849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 2937673 = 143945977 / (1 + 4 + 3 + 9 + 4 + 5 + 9 + 7 + 7).

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 143945977.

It is not an unprimeable number, because it can be changed into a prime (143945077) 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 5 ways as a sum of consecutive naturals, for example, 1468788 + ... + 1468885.

It is an arithmetic number, because the mean of its divisors is an integer number (27907903).

Almost surely, 2^143945977 is an apocalyptic number.

It is an amenable number.

143945977 is a deficient number, since it is larger than the sum of its proper divisors (23501441).

143945977 is an equidigital number, since it uses as much as digits as its factorization.

143945977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937687 (or 2937680 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 143945977 is about 11997.7488305098. The cubic root of 143945977 is about 524.0827242024.

The spelling of 143945977 in words is "one hundred forty-three million, nine hundred forty-five thousand, nine hundred seventy-seven".