83239649 has 4 divisors (see below), whose sum is σ = 83399940. Its totient is φ = 83079360.

The previous prime is 83239643. The next prime is 83239697. The reversal of 83239649 is 94693238.

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 44089600 + 39150049 = 6640^2 + 6257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83239649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83239643) 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 3 ways as a sum of consecutive naturals, for example, 79364 + ... + 80405.

It is an arithmetic number, because the mean of its divisors is an integer number (20849985).

Almost surely, 2^83239649 is an apocalyptic number.

It is an amenable number.

83239649 is a deficient number, since it is larger than the sum of its proper divisors (160291).

83239649 is a wasteful number, since it uses less digits than its factorization.

83239649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160290.

The product of its digits is 279936, while the sum is 44.

The square root of 83239649 is about 9123.5765465085. The cubic root of 83239649 is about 436.6264893853.

The spelling of 83239649 in words is "eighty-three million, two hundred thirty-nine thousand, six hundred forty-nine".