993410861 has 4 divisors (see below), whose sum is σ = 1051846812. Its totient is φ = 934974912.

The previous prime is 993410843. The next prime is 993410867. The reversal of 993410861 is 168014399.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625500100 + 367910761 = 25010^2 + 19181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993410861 is a prime.

It is a super-2 number, since 2×993410861² = 1973730277505522642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993410867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29217950 + ... + 29217983.

It is an arithmetic number, because the mean of its divisors is an integer number (262961703).

Almost surely, 2^993410861 is an apocalyptic number.

It is an amenable number.

993410861 is a deficient number, since it is larger than the sum of its proper divisors (58435951).

993410861 is a wasteful number, since it uses less digits than its factorization.

993410861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58435950.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 993410861 is about 31518.4209788498. The cubic root of 993410861 is about 997.7987785125.

The spelling of 993410861 in words is "nine hundred ninety-three million, four hundred ten thousand, eight hundred sixty-one".