83355649 has 4 divisors (see below), whose sum is σ = 89767636. Its totient is φ = 76943664.

The previous prime is 83355631. The next prime is 83355653. The reversal of 83355649 is 94655338.

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 52664049 + 30691600 = 7257^2 + 5540^2 .

It is a cyclic number.

It is not a de Polignac number, because 83355649 - 2⁵ = 83355617 is a prime.

It is a super-2 number, since 2×83355649² = 13896328440422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83355619) 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, 3205974 + ... + 3205999.

It is an arithmetic number, because the mean of its divisors is an integer number (22441909).

Almost surely, 2^83355649 is an apocalyptic number.

It is an amenable number.

83355649 is a deficient number, since it is larger than the sum of its proper divisors (6411987).

83355649 is a wasteful number, since it uses less digits than its factorization.

83355649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411986.

The product of its digits is 388800, while the sum is 43.

The square root of 83355649 is about 9129.9314893377. The cubic root of 83355649 is about 436.8292179493.

The spelling of 83355649 in words is "eighty-three million, three hundred fifty-five thousand, six hundred forty-nine".