81829698 has 16 divisors (see below), whose sum is σ = 164189376. Its totient is φ = 27188240.

The previous prime is 81829697. The next prime is 81829723. The reversal of 81829698 is 89692818.

It is a self number, because there is not a number n which added to its sum of digits gives 81829698.

It is not an unprimeable number, because it can be changed into a prime (81829691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20061 + ... + 23792.

It is an arithmetic number, because the mean of its divisors is an integer number (10261836).

Almost surely, 2^81829698 is an apocalyptic number.

81829698 is an abundant number, since it is smaller than the sum of its proper divisors (82359678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81829698 is a wasteful number, since it uses less digits than its factorization.

81829698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44169.

The product of its digits is 497664, while the sum is 51.

The square root of 81829698 is about 9045.9768958361. The cubic root of 81829698 is about 434.1471783813.

The spelling of 81829698 in words is "eighty-one million, eight hundred twenty-nine thousand, six hundred ninety-eight".