81672098 has 16 divisors (see below), whose sum is σ = 126093120. Its totient is φ = 39645936.

The previous prime is 81672077. The next prime is 81672113. The reversal of 81672098 is 89027618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44915 + ... + 46697.

It is an arithmetic number, because the mean of its divisors is an integer number (7880820).

Almost surely, 2^81672098 is an apocalyptic number.

81672098 is a deficient number, since it is larger than the sum of its proper divisors (44421022).

81672098 is a wasteful number, since it uses less digits than its factorization.

81672098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 81672098 is about 9037.2616427765. The cubic root of 81672098 is about 433.8682838414.

The spelling of 81672098 in words is "eighty-one million, six hundred seventy-two thousand, ninety-eight".