81059398 has 8 divisors (see below), whose sum is σ = 138958992. Its totient is φ = 34739736.

The previous prime is 81059371. The next prime is 81059399. The reversal of 81059398 is 89395018.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81059399) 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, 2894965 + ... + 2894992.

It is an arithmetic number, because the mean of its divisors is an integer number (17369874).

Almost surely, 2^81059398 is an apocalyptic number.

81059398 is a deficient number, since it is larger than the sum of its proper divisors (57899594).

81059398 is a wasteful number, since it uses less digits than its factorization.

81059398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789966.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 81059398 is about 9003.2992841513. The cubic root of 81059398 is about 432.7806066582.

The spelling of 81059398 in words is "eighty-one million, fifty-nine thousand, three hundred ninety-eight".