993925817 has 2 divisors, whose sum is σ = 993925818. Its totient is φ = 993925816.

The previous prime is 993925799. The next prime is 993925847. The reversal of 993925817 is 718529399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723125881 + 270799936 = 26891^2 + 16456^2 .

It is a cyclic number.

It is not a de Polignac number, because 993925817 - 2¹⁰ = 993924793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (993925847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496962908 + 496962909.

It is an arithmetic number, because the mean of its divisors is an integer number (496962909).

Almost surely, 2^993925817 is an apocalyptic number.

It is an amenable number.

993925817 is a deficient number, since it is larger than the sum of its proper divisors (1).

993925817 is an equidigital number, since it uses as much as digits as its factorization.

993925817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The square root of 993925817 is about 31526.5890479766. The cubic root of 993925817 is about 997.9711589209.

The spelling of 993925817 in words is "nine hundred ninety-three million, nine hundred twenty-five thousand, eight hundred seventeen".