83872187405 has 8 divisors (see below), whose sum is σ = 100772911512. Its totient is φ = 67013558848.

The previous prime is 83872187363. The next prime is 83872187437. The reversal of 83872187405 is 50478127838.

It can be written as a sum of positive squares in 4 ways, for example, as 16145768356 + 67726419049 = 127066^2 + 260243^2 .

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 83872187405 - 2⁶ = 83872187341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10519502 + ... + 10527471.

It is an arithmetic number, because the mean of its divisors is an integer number (12596613939).

Almost surely, 2^83872187405 is an apocalyptic number.

It is an amenable number.

83872187405 is a deficient number, since it is larger than the sum of its proper divisors (16900724107).

83872187405 is a wasteful number, since it uses less digits than its factorization.

83872187405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21047775.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 83872187405 in words is "eighty-three billion, eight hundred seventy-two million, one hundred eighty-seven thousand, four hundred five".