98171681 has 2 divisors, whose sum is σ = 98171682. Its totient is φ = 98171680.

The previous prime is 98171677. The next prime is 98171737. The reversal of 98171681 is 18617189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 31259281 = 8180^2 + 5591^2 .

It is a cyclic number.

It is not a de Polignac number, because 98171681 - 2² = 98171677 is a prime.

It is a super-2 number, since 2×98171681² = 19275357900731522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98171581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49085840 + 49085841.

It is an arithmetic number, because the mean of its divisors is an integer number (49085841).

Almost surely, 2^98171681 is an apocalyptic number.

It is an amenable number.

98171681 is a deficient number, since it is larger than the sum of its proper divisors (1).

98171681 is an equidigital number, since it uses as much as digits as its factorization.

98171681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 41.

The square root of 98171681 is about 9908.1623422308. The cubic root of 98171681 is about 461.3126981013.

The spelling of 98171681 in words is "ninety-eight million, one hundred seventy-one thousand, six hundred eighty-one".