80861693 has 8 divisors (see below), whose sum is σ = 88293216. Its totient is φ = 73443600.

The previous prime is 80861689. The next prime is 80861699. The reversal of 80861693 is 39616808.

It is a happy number.

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 80861693 - 2² = 80861689 is a prime.

It is a super-2 number, since 2×80861693² = 13077226789652498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80861693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80861699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530 + ... + 17852.

It is an arithmetic number, because the mean of its divisors is an integer number (11036652).

Almost surely, 2^80861693 is an apocalyptic number.

It is an amenable number.

80861693 is a deficient number, since it is larger than the sum of its proper divisors (7431523).

80861693 is a wasteful number, since it uses less digits than its factorization.

80861693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6715.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 80861693 is about 8992.3129949974. The cubic root of 80861693 is about 432.4284675709.

It can be divided in two parts, 8086 and 1693, that added together give a palindrome (9779).

The spelling of 80861693 in words is "eighty million, eight hundred sixty-one thousand, six hundred ninety-three".