83309445 has 16 divisors (see below), whose sum is σ = 148105920. Its totient is φ = 44431632.

The previous prime is 83309423. The next prime is 83309449. The reversal of 83309445 is 54490338.

It is not a de Polignac number, because 83309445 - 2⁹ = 83308933 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83309449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308419 + ... + 308688.

It is an arithmetic number, because the mean of its divisors is an integer number (9256620).

Almost surely, 2^83309445 is an apocalyptic number.

It is an amenable number.

83309445 is a deficient number, since it is larger than the sum of its proper divisors (64796475).

83309445 is a wasteful number, since it uses less digits than its factorization.

83309445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617121 (or 617115 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 83309445 is about 9127.4007800688. The cubic root of 83309445 is about 436.7484916168.

The spelling of 83309445 in words is "eighty-three million, three hundred nine thousand, four hundred forty-five".