99985397 has 2 divisors, whose sum is σ = 99985398. Its totient is φ = 99985396.

The previous prime is 99985351. The next prime is 99985409. The reversal of 99985397 is 79358999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99221521 + 763876 = 9961^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 99985397 - 2⁸ = 99985141 is a prime.

It is a super-2 number, since 2×99985397² = 19994159226495218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992698 + 49992699.

It is an arithmetic number, because the mean of its divisors is an integer number (49992699).

Almost surely, 2^99985397 is an apocalyptic number.

It is an amenable number.

99985397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985397 is an equidigital number, since it uses as much as digits as its factorization.

99985397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 59.

The square root of 99985397 is about 9999.2698233421. The cubic root of 99985397 is about 464.1362885542.

The spelling of 99985397 in words is "ninety-nine million, nine hundred eighty-five thousand, three hundred ninety-seven".