993143841 has 32 divisors (see below), whose sum is σ = 1399956480. Its totient is φ = 625040064.

The previous prime is 993143821. The next prime is 993143843. The reversal of 993143841 is 148341399.

It is not a de Polignac number, because 993143841 - 2⁶ = 993143777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 993143793 and 993143802.

It is not an unprimeable number, because it can be changed into a prime (993143843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2552875 + ... + 2553263.

It is an arithmetic number, because the mean of its divisors is an integer number (43748640).

Almost surely, 2^993143841 is an apocalyptic number.

It is an amenable number.

993143841 is a deficient number, since it is larger than the sum of its proper divisors (406812639).

993143841 is a wasteful number, since it uses less digits than its factorization.

993143841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its digits is 93312, while the sum is 42.

The square root of 993143841 is about 31514.1847586131. The cubic root of 993143841 is about 997.7093706903.

The spelling of 993143841 in words is "nine hundred ninety-three million, one hundred forty-three thousand, eight hundred forty-one".