83912861 has 4 divisors (see below), whose sum is σ = 84008352. Its totient is φ = 83817372.

The previous prime is 83912839. The next prime is 83912869. The reversal of 83912861 is 16821938.

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 not a de Polignac number, because 83912861 - 2¹⁰ = 83911837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83912869) 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, 46415 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (21002088).

Almost surely, 2^83912861 is an apocalyptic number.

It is an amenable number.

83912861 is a deficient number, since it is larger than the sum of its proper divisors (95491).

83912861 is an equidigital number, since it uses as much as digits as its factorization.

83912861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95490.

The product of its digits is 20736, while the sum is 38.

The square root of 83912861 is about 9160.3963342205. The cubic root of 83912861 is about 437.8004223392.

The spelling of 83912861 in words is "eighty-three million, nine hundred twelve thousand, eight hundred sixty-one".