89198861 has 2 divisors, whose sum is σ = 89198862. Its totient is φ = 89198860.

The previous prime is 89198839. The next prime is 89198911. The reversal of 89198861 is 16889198.

It is a happy number.

It is an a-pointer prime, because the next prime (89198911) can be obtained adding 89198861 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63696361 + 25502500 = 7981^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 89198861 - 2⁶ = 89198797 is a prime.

It is a zygodrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89198801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44599430 + 44599431.

It is an arithmetic number, because the mean of its divisors is an integer number (44599431).

Almost surely, 2^89198861 is an apocalyptic number.

It is an amenable number.

89198861 is a deficient number, since it is larger than the sum of its proper divisors (1).

89198861 is an equidigital number, since it uses as much as digits as its factorization.

89198861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 50.

The square root of 89198861 is about 9444.5148631362. The cubic root of 89198861 is about 446.8067954069.

The spelling of 89198861 in words is "eighty-nine million, one hundred ninety-eight thousand, eight hundred sixty-one".