99761 has 2 divisors, whose sum is σ = 99762. Its totient is φ = 99760.

The previous prime is 99733. The next prime is 99767. The reversal of 99761 is 16799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65536 + 34225 = 256^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 99761 - 2¹⁰ = 98737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49880 + 49881.

It is an arithmetic number, because the mean of its divisors is an integer number (49881).

2⁹⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

99761 is a deficient number, since it is larger than the sum of its proper divisors (1).

99761 is an equidigital number, since it uses as much as digits as its factorization.

99761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 32.

The square root of 99761 is about 315.8496477756. The cubic root of 99761 is about 46.3788808468.

The spelling of 99761 in words is "ninety-nine thousand, seven hundred sixty-one".