83873561 has 8 divisors (see below), whose sum is σ = 86370504. Its totient is φ = 81388800.

The previous prime is 83873557. The next prime is 83873567. The reversal of 83873561 is 16537838.

It can be written as a sum of positive squares in 4 ways, for example, as 67551961 + 16321600 = 8219^2 + 4040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83873561 - 2² = 83873557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83873567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12011 + ... + 17663.

It is an arithmetic number, because the mean of its divisors is an integer number (10796313).

Almost surely, 2^83873561 is an apocalyptic number.

It is an amenable number.

83873561 is a deficient number, since it is larger than the sum of its proper divisors (2496943).

83873561 is a wasteful number, since it uses less digits than its factorization.

83873561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091.

The product of its digits is 120960, while the sum is 41.

The square root of 83873561 is about 9158.2509793082. The cubic root of 83873561 is about 437.7320647472.

The spelling of 83873561 in words is "eighty-three million, eight hundred seventy-three thousand, five hundred sixty-one".