98888861 has 2 divisors, whose sum is σ = 98888862. Its totient is φ = 98888860.

The previous prime is 98888837. The next prime is 98888921. The reversal of 98888861 is 16888889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 38204761 = 7790^2 + 6181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98888861 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 98888797 and 98888806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98888561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49444430 + 49444431.

It is an arithmetic number, because the mean of its divisors is an integer number (49444431).

Almost surely, 2^98888861 is an apocalyptic number.

It is an amenable number.

98888861 is a deficient number, since it is larger than the sum of its proper divisors (1).

98888861 is an equidigital number, since it uses as much as digits as its factorization.

98888861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1769472, while the sum is 56.

The square root of 98888861 is about 9944.2878578609. The cubic root of 98888861 is about 462.4333262544.

The spelling of 98888861 in words is "ninety-eight million, eight hundred eighty-eight thousand, eight hundred sixty-one".