83143944377 has 4 divisors (see below), whose sum is σ = 89539632420. Its totient is φ = 76748256336.

The previous prime is 83143944283. The next prime is 83143944391. The reversal of 83143944377 is 77344934138.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50728102441 + 32415841936 = 225229^2 + 180044^2 .

It is a cyclic number.

It is not a de Polignac number, because 83143944377 - 2¹² = 83143940281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83143944677) 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, 3197844002 + ... + 3197844027.

It is an arithmetic number, because the mean of its divisors is an integer number (22384908105).

Almost surely, 2^83143944377 is an apocalyptic number.

It is an amenable number.

83143944377 is a deficient number, since it is larger than the sum of its proper divisors (6395688043).

83143944377 is a wasteful number, since it uses less digits than its factorization.

83143944377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395688042.

The product of its digits is 6096384, while the sum is 53.

The spelling of 83143944377 in words is "eighty-three billion, one hundred forty-three million, nine hundred forty-four thousand, three hundred seventy-seven".