993191038 has 16 divisors (see below), whose sum is σ = 1742209920. Its totient is φ = 415754136.

The previous prime is 993191033. The next prime is 993191039. The reversal of 993191038 is 830191399.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 993190985 and 993191003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993191033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824308 + ... + 825511.

It is an arithmetic number, because the mean of its divisors is an integer number (108888120).

Almost surely, 2^993191038 is an apocalyptic number.

993191038 is a deficient number, since it is larger than the sum of its proper divisors (749018882).

993191038 is a wasteful number, since it uses less digits than its factorization.

993191038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649871.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 993191038 is about 31514.9335712452. The cubic root of 993191038 is about 997.7251750956.

The spelling of 993191038 in words is "nine hundred ninety-three million, one hundred ninety-one thousand, thirty-eight".