81598343 has 4 divisors (see below), whose sum is σ = 81923688. Its totient is φ = 81273000.

The previous prime is 81598339. The next prime is 81598393. The reversal of 81598343 is 34389518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34389518 = 2 ⋅17194759.

It is a cyclic number.

It is not a de Polignac number, because 81598343 - 2² = 81598339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81598343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81598313) 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, 162296 + ... + 162797.

It is an arithmetic number, because the mean of its divisors is an integer number (20480922).

Almost surely, 2^81598343 is an apocalyptic number.

81598343 is a deficient number, since it is larger than the sum of its proper divisors (325345).

81598343 is a wasteful number, since it uses less digits than its factorization.

81598343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325344.

The product of its digits is 103680, while the sum is 41.

The square root of 81598343 is about 9033.1801155518. The cubic root of 81598343 is about 433.7376411309.

The spelling of 81598343 in words is "eighty-one million, five hundred ninety-eight thousand, three hundred forty-three".