873817937381 has 4 divisors (see below), whose sum is σ = 874004695200. Its totient is φ = 873631179564.

The previous prime is 873817937347. The next prime is 873817937417. The reversal of 873817937381 is 183739718378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-873817937381 is a prime.

It is a super-2 number, since 2×873817937381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873817937341) 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, 93371891 + ... + 93381248.

It is an arithmetic number, because the mean of its divisors is an integer number (218501173800).

Almost surely, 2^873817937381 is an apocalyptic number.

It is an amenable number.

873817937381 is a deficient number, since it is larger than the sum of its proper divisors (186757819).

873817937381 is a wasteful number, since it uses less digits than its factorization.

873817937381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186757818.

The product of its digits is 42674688, while the sum is 65.

The spelling of 873817937381 in words is "eight hundred seventy-three billion, eight hundred seventeen million, nine hundred thirty-seven thousand, three hundred eighty-one".