98879621 has 2 divisors, whose sum is σ = 98879622. Its totient is φ = 98879620.

The previous prime is 98879603. The next prime is 98879653. The reversal of 98879621 is 12697889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69122596 + 29757025 = 8314^2 + 5455^2 .

It is a cyclic number.

It is not a de Polignac number, because 98879621 - 2¹⁰ = 98878597 is a prime.

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 98879621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98870621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49439810 + 49439811.

It is an arithmetic number, because the mean of its divisors is an integer number (49439811).

Almost surely, 2^98879621 is an apocalyptic number.

It is an amenable number.

98879621 is a deficient number, since it is larger than the sum of its proper divisors (1).

98879621 is an equidigital number, since it uses as much as digits as its factorization.

98879621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 98879621 is about 9943.8232586868. The cubic root of 98879621 is about 462.4189228222.

The spelling of 98879621 in words is "ninety-eight million, eight hundred seventy-nine thousand, six hundred twenty-one".