83873857 has 4 divisors (see below), whose sum is σ = 86140756. Its totient is φ = 81606960.

The previous prime is 83873849. The next prime is 83873873. The reversal of 83873857 is 75837838.

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 71978256 + 11895601 = 8484^2 + 3449^2 .

It is a cyclic number.

It is not a de Polignac number, because 83873857 - 2³ = 83873849 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 83873857.

It is not an unprimeable number, because it can be changed into a prime (83873807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1133394 + ... + 1133467.

It is an arithmetic number, because the mean of its divisors is an integer number (21535189).

Almost surely, 2^83873857 is an apocalyptic number.

It is an amenable number.

83873857 is a deficient number, since it is larger than the sum of its proper divisors (2266899).

83873857 is a wasteful number, since it uses less digits than its factorization.

83873857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266898.

The product of its digits is 1128960, while the sum is 49.

The square root of 83873857 is about 9158.2671395849. The cubic root of 83873857 is about 437.7325796832.

The spelling of 83873857 in words is "eighty-three million, eight hundred seventy-three thousand, eight hundred fifty-seven".