89309761 has 2 divisors, whose sum is σ = 89309762. Its totient is φ = 89309760.

The previous prime is 89309719. The next prime is 89309777. The reversal of 89309761 is 16790398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76457536 + 12852225 = 8744^2 + 3585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89309761 is a prime.

It is not a weakly prime, because it can be changed into another prime (89309711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44654880 + 44654881.

It is an arithmetic number, because the mean of its divisors is an integer number (44654881).

Almost surely, 2^89309761 is an apocalyptic number.

It is an amenable number.

89309761 is a deficient number, since it is larger than the sum of its proper divisors (1).

89309761 is an equidigital number, since it uses as much as digits as its factorization.

89309761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 89309761 is about 9450.3841720853. The cubic root of 89309761 is about 446.9918887734.

The spelling of 89309761 in words is "eighty-nine million, three hundred nine thousand, seven hundred sixty-one".