98901989 has 2 divisors, whose sum is σ = 98901990. Its totient is φ = 98901988.

The previous prime is 98901967. The next prime is 98902003. The reversal of 98901989 is 98910989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98208100 + 693889 = 9910^2 + 833^2 .

It is an emirp because it is prime and its reverse (98910989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98901989 is a prime.

It is a super-2 number, since 2×98901989² = 19563206856312242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98901989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98901589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49450994 + 49450995.

It is an arithmetic number, because the mean of its divisors is an integer number (49450995).

Almost surely, 2^98901989 is an apocalyptic number.

It is an amenable number.

98901989 is a deficient number, since it is larger than the sum of its proper divisors (1).

98901989 is an equidigital number, since it uses as much as digits as its factorization.

98901989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 98901989 is about 9944.9479133880. The cubic root of 98901989 is about 462.4537888088.

The spelling of 98901989 in words is "ninety-eight million, nine hundred one thousand, nine hundred eighty-nine".