99917261 has 2 divisors, whose sum is σ = 99917262. Its totient is φ = 99917260.

The previous prime is 99917227. The next prime is 99917281. The reversal of 99917261 is 16271999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 32775625 = 8194^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 99917261 - 2⁶ = 99917197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99917201) 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, 49958630 + 49958631.

It is an arithmetic number, because the mean of its divisors is an integer number (49958631).

Almost surely, 2^99917261 is an apocalyptic number.

It is an amenable number.

99917261 is a deficient number, since it is larger than the sum of its proper divisors (1).

99917261 is an equidigital number, since it uses as much as digits as its factorization.

99917261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 44.

The square root of 99917261 is about 9995.8621939280. The cubic root of 99917261 is about 464.0308345665.

The spelling of 99917261 in words is "ninety-nine million, nine hundred seventeen thousand, two hundred sixty-one".