81941338 has 8 divisors (see below), whose sum is σ = 129381120. Its totient is φ = 38814300.

The previous prime is 81941303. The next prime is 81941369. The reversal of 81941338 is 83314918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81941297 and 81941306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078138 + ... + 1078213.

It is an arithmetic number, because the mean of its divisors is an integer number (16172640).

Almost surely, 2^81941338 is an apocalyptic number.

81941338 is a deficient number, since it is larger than the sum of its proper divisors (47439782).

81941338 is a wasteful number, since it uses less digits than its factorization.

81941338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156372.

The product of its digits is 20736, while the sum is 37.

The square root of 81941338 is about 9052.1454915396. The cubic root of 81941338 is about 434.3445238732.

The spelling of 81941338 in words is "eighty-one million, nine hundred forty-one thousand, three hundred thirty-eight".