993507841 has 2 divisors, whose sum is σ = 993507842. Its totient is φ = 993507840.

The previous prime is 993507833. The next prime is 993507847. The reversal of 993507841 is 148705399.

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., 805708225 + 187799616 = 28385^2 + 13704^2 .

It is an emirp because it is prime and its reverse (148705399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993507841 - 2³ = 993507833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 993507791 and 993507800.

It is not a weakly prime, because it can be changed into another prime (993507847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496753920 + 496753921.

It is an arithmetic number, because the mean of its divisors is an integer number (496753921).

Almost surely, 2^993507841 is an apocalyptic number.

It is an amenable number.

993507841 is a deficient number, since it is larger than the sum of its proper divisors (1).

993507841 is an equidigital number, since it uses as much as digits as its factorization.

993507841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 993507841 is about 31519.9594066997. The cubic root of 993507841 is about 997.8312469103.

The spelling of 993507841 in words is "nine hundred ninety-three million, five hundred seven thousand, eight hundred forty-one".