88685981 has 2 divisors, whose sum is σ = 88685982. Its totient is φ = 88685980.

The previous prime is 88685963. The next prime is 88685983. The reversal of 88685981 is 18958688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82973881 + 5712100 = 9109^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 88685981 - 2¹⁴ = 88669597 is a prime.

It is a super-2 number, since 2×88685981² = 15730406451864722, which contains 22 as substring.

Together with 88685983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88685983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44342990 + 44342991.

It is an arithmetic number, because the mean of its divisors is an integer number (44342991).

Almost surely, 2^88685981 is an apocalyptic number.

It is an amenable number.

88685981 is a deficient number, since it is larger than the sum of its proper divisors (1).

88685981 is an equidigital number, since it uses as much as digits as its factorization.

88685981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 53.

The square root of 88685981 is about 9417.3234520218. The cubic root of 88685981 is about 445.9487916030.

The spelling of 88685981 in words is "eighty-eight million, six hundred eighty-five thousand, nine hundred eighty-one".