98781161 has 2 divisors, whose sum is σ = 98781162. Its totient is φ = 98781160.

The previous prime is 98781091. The next prime is 98781173. The reversal of 98781161 is 16118789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92929600 + 5851561 = 9640^2 + 2419^2 .

It is an emirp because it is prime and its reverse (16118789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98781161 - 2¹⁰ = 98780137 is a prime.

It is not a weakly prime, because it can be changed into another prime (98781181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49390580 + 49390581.

It is an arithmetic number, because the mean of its divisors is an integer number (49390581).

Almost surely, 2^98781161 is an apocalyptic number.

It is an amenable number.

98781161 is a deficient number, since it is larger than the sum of its proper divisors (1).

98781161 is an equidigital number, since it uses as much as digits as its factorization.

98781161 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 98781161 is about 9938.8712135735. The cubic root of 98781161 is about 462.2653863394.

The spelling of 98781161 in words is "ninety-eight million, seven hundred eighty-one thousand, one hundred sixty-one".