98888921 has 2 divisors, whose sum is σ = 98888922. Its totient is φ = 98888920.

The previous prime is 98888861. The next prime is 98888941. The reversal of 98888921 is 12988889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95335696 + 3553225 = 9764^2 + 1885^2 .

It is an emirp because it is prime and its reverse (12988889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98888921 - 2²⁶ = 31780057 is a prime.

It is not a weakly prime, because it can be changed into another prime (98888941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49444460 + 49444461.

It is an arithmetic number, because the mean of its divisors is an integer number (49444461).

Almost surely, 2^98888921 is an apocalyptic number.

It is an amenable number.

98888921 is a deficient number, since it is larger than the sum of its proper divisors (1).

98888921 is an equidigital number, since it uses as much as digits as its factorization.

98888921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 53.

The square root of 98888921 is about 9944.2908746677. The cubic root of 98888921 is about 462.4334197803.

The spelling of 98888921 in words is "ninety-eight million, eight hundred eighty-eight thousand, nine hundred twenty-one".