83768445 has 16 divisors (see below), whose sum is σ = 148921920. Its totient is φ = 44676432.

The previous prime is 83768441. The next prime is 83768527. The reversal of 83768445 is 54486738.

It is not a de Polignac number, because 83768445 - 2² = 83768441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83768445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83768441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310119 + ... + 310388.

It is an arithmetic number, because the mean of its divisors is an integer number (9307620).

Almost surely, 2^83768445 is an apocalyptic number.

It is an amenable number.

83768445 is a deficient number, since it is larger than the sum of its proper divisors (65153475).

83768445 is a wasteful number, since it uses less digits than its factorization.

83768445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620521 (or 620515 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 83768445 is about 9152.5103113845. The cubic root of 83768445 is about 437.5491231916.

The spelling of 83768445 in words is "eighty-three million, seven hundred sixty-eight thousand, four hundred forty-five".