83443961 has 4 divisors (see below), whose sum is σ = 83501712. Its totient is φ = 83386212.

The previous prime is 83443937. The next prime is 83443963. The reversal of 83443961 is 16934438.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83443961 - 2¹⁸ = 83181817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83443963) 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, 26651 + ... + 29616.

It is an arithmetic number, because the mean of its divisors is an integer number (20875428).

Almost surely, 2^83443961 is an apocalyptic number.

It is an amenable number.

83443961 is a deficient number, since it is larger than the sum of its proper divisors (57751).

83443961 is a wasteful number, since it uses less digits than its factorization.

83443961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57750.

The product of its digits is 62208, while the sum is 38.

The square root of 83443961 is about 9134.7666089507. The cubic root of 83443961 is about 436.9834312377.

The spelling of 83443961 in words is "eighty-three million, four hundred forty-three thousand, nine hundred sixty-one".