908993 has 2 divisors, whose sum is σ = 908994. Its totient is φ = 908992.

The previous prime is 908959. The next prime is 909019. The reversal of 908993 is 399809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 908209 + 784 = 953^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 908993 - 2¹⁰ = 907969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (908953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454496 + 454497.

It is an arithmetic number, because the mean of its divisors is an integer number (454497).

2⁹⁰⁸⁹⁹³ is an apocalyptic number.

It is an amenable number.

908993 is a deficient number, since it is larger than the sum of its proper divisors (1).

908993 is an equidigital number, since it uses as much as digits as its factorization.

908993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 908993 is about 953.4112439027. The cubic root of 908993 is about 96.8694527521.

The spelling of 908993 in words is "nine hundred eight thousand, nine hundred ninety-three".