98461981 has 2 divisors, whose sum is σ = 98461982. Its totient is φ = 98461980.

The previous prime is 98461967. The next prime is 98461997. The reversal of 98461981 is 18916489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63059481 + 35402500 = 7941^2 + 5950^2 .

It is an emirp because it is prime and its reverse (18916489) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98461981 is a prime.

It is a super-2 number, since 2×98461981² = 19389523404888722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98461681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49230990 + 49230991.

It is an arithmetic number, because the mean of its divisors is an integer number (49230991).

Almost surely, 2^98461981 is an apocalyptic number.

It is an amenable number.

98461981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98461981 is an equidigital number, since it uses as much as digits as its factorization.

98461981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 98461981 is about 9922.8010662312. The cubic root of 98461981 is about 461.7669611123.

The spelling of 98461981 in words is "ninety-eight million, four hundred sixty-one thousand, nine hundred eighty-one".