81896941 has 4 divisors (see below), whose sum is σ = 93596512. Its totient is φ = 70197372.

The previous prime is 81896929. The next prime is 81896959. The reversal of 81896941 is 14969818.

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 not a de Polignac number, because 81896941 - 2⁵ = 81896909 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81896891 and 81896900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81896911) 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, 5849775 + ... + 5849788.

It is an arithmetic number, because the mean of its divisors is an integer number (23399128).

Almost surely, 2^81896941 is an apocalyptic number.

It is an amenable number.

81896941 is a deficient number, since it is larger than the sum of its proper divisors (11699571).

81896941 is a wasteful number, since it uses less digits than its factorization.

81896941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11699570.

The product of its digits is 124416, while the sum is 46.

The square root of 81896941 is about 9049.6928677166. The cubic root of 81896941 is about 434.2660649901.

The spelling of 81896941 in words is "eighty-one million, eight hundred ninety-six thousand, nine hundred forty-one".