99364981 has 2 divisors, whose sum is σ = 99364982. Its totient is φ = 99364980.

The previous prime is 99364931. The next prime is 99364987. The reversal of 99364981 is 18946399.

It is the 4070-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98684356 + 680625 = 9934^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 99364981 - 2¹¹ = 99362933 is a prime.

It is a super-2 number, since 2×99364981² = 19746798898260722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99364987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49682490 + 49682491.

It is an arithmetic number, because the mean of its divisors is an integer number (49682491).

Almost surely, 2^99364981 is an apocalyptic number.

It is an amenable number.

99364981 is a deficient number, since it is larger than the sum of its proper divisors (1).

99364981 is an equidigital number, since it uses as much as digits as its factorization.

99364981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 99364981 is about 9968.1984831764. The cubic root of 99364981 is about 463.1742972748.

The spelling of 99364981 in words is "ninety-nine million, three hundred sixty-four thousand, nine hundred eighty-one".