993191963 has 8 divisors (see below), whose sum is σ = 1013449968. Its totient is φ = 972990304.

The previous prime is 993191893. The next prime is 993191989. The reversal of 993191963 is 369191399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993191963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993191993) 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, 22481 + ... + 49917.

It is an arithmetic number, because the mean of its divisors is an integer number (126681246).

Almost surely, 2^993191963 is an apocalyptic number.

993191963 is a deficient number, since it is larger than the sum of its proper divisors (20258005).

993191963 is a wasteful number, since it uses less digits than its factorization.

993191963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28173.

The product of its digits is 354294, while the sum is 50.

The square root of 993191963 is about 31514.9482468241. The cubic root of 993191963 is about 997.7254848364.

The spelling of 993191963 in words is "nine hundred ninety-three million, one hundred ninety-one thousand, nine hundred sixty-three".