83857073 has 4 divisors (see below), whose sum is σ = 88789860. Its totient is φ = 78924288.

The previous prime is 83857049. The next prime is 83857099. The reversal of 83857073 is 37075838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37075838 = 2 ⋅18537919.

It can be written as a sum of positive squares in 2 ways, for example, as 62853184 + 21003889 = 7928^2 + 4583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83857073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83857073.

It is not an unprimeable number, because it can be changed into a prime (83857003) 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 3 ways as a sum of consecutive naturals, for example, 2466368 + ... + 2466401.

It is an arithmetic number, because the mean of its divisors is an integer number (22197465).

Almost surely, 2^83857073 is an apocalyptic number.

It is an amenable number.

83857073 is a deficient number, since it is larger than the sum of its proper divisors (4932787).

83857073 is a wasteful number, since it uses less digits than its factorization.

83857073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932786.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 83857073 is about 9157.3507631847. The cubic root of 83857073 is about 437.7033795089.

The spelling of 83857073 in words is "eighty-three million, eight hundred fifty-seven thousand, seventy-three".