98181961 has 2 divisors, whose sum is σ = 98181962. Its totient is φ = 98181960.

The previous prime is 98181901. The next prime is 98181997. The reversal of 98181961 is 16918189.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 962361 = 9860^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 98181961 - 2¹³ = 98173769 is a prime.

It is a super-3 number, since 3×98181961³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (98181901) 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 as a sum of consecutive naturals, namely, 49090980 + 49090981.

It is an arithmetic number, because the mean of its divisors is an integer number (49090981).

Almost surely, 2^98181961 is an apocalyptic number.

It is an amenable number.

98181961 is a deficient number, since it is larger than the sum of its proper divisors (1).

98181961 is an equidigital number, since it uses as much as digits as its factorization.

98181961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 43.

The square root of 98181961 is about 9908.6810928599. The cubic root of 98181961 is about 461.3287995845.

The spelling of 98181961 in words is "ninety-eight million, one hundred eighty-one thousand, nine hundred sixty-one".