993053909 has 2 divisors, whose sum is σ = 993053910. Its totient is φ = 993053908.

The previous prime is 993053869. The next prime is 993053933. The reversal of 993053909 is 909350399.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797893009 + 195160900 = 28247^2 + 13970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993053909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993053959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496526954 + 496526955.

It is an arithmetic number, because the mean of its divisors is an integer number (496526955).

Almost surely, 2^993053909 is an apocalyptic number.

It is an amenable number.

993053909 is a deficient number, since it is larger than the sum of its proper divisors (1).

993053909 is an equidigital number, since it uses as much as digits as its factorization.

993053909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 295245, while the sum is 47.

The square root of 993053909 is about 31512.7578767711. The cubic root of 993053909 is about 997.6792546407.

The spelling of 993053909 in words is "nine hundred ninety-three million, fifty-three thousand, nine hundred nine".