88198981 has 8 divisors (see below), whose sum is σ = 95196024. Its totient is φ = 81232320.

The previous prime is 88198973. The next prime is 88198987. The reversal of 88198981 is 18989188.

It can be written as a sum of positive squares in 4 ways, for example, as 8100 + 88190881 = 90^2 + 9391^2 .

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

It is not a de Polignac number, because 88198981 - 2³ = 88198973 is a prime.

It is a super-2 number, since 2×88198981² = 15558120498876722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88198987) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1366 + ... + 13351.

It is an arithmetic number, because the mean of its divisors is an integer number (11899503).

Almost surely, 2^88198981 is an apocalyptic number.

It is an amenable number.

88198981 is a deficient number, since it is larger than the sum of its proper divisors (6997043).

88198981 is a wasteful number, since it uses less digits than its factorization.

88198981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15191.

The product of its digits is 331776, while the sum is 52.

The square root of 88198981 is about 9391.4312540741. The cubic root of 88198981 is about 445.1310155828.

The spelling of 88198981 in words is "eighty-eight million, one hundred ninety-eight thousand, nine hundred eighty-one".