993213979 has 4 divisors (see below), whose sum is σ = 994906584. Its totient is φ = 991521376.

The previous prime is 993213919. The next prime is 993213989. The reversal of 993213979 is 979312399.

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

It is a cyclic number.

It is not a de Polignac number, because 993213979 - 2¹¹ = 993211931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993213919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845422 + ... + 846595.

It is an arithmetic number, because the mean of its divisors is an integer number (248726646).

Almost surely, 2^993213979 is an apocalyptic number.

993213979 is a deficient number, since it is larger than the sum of its proper divisors (1692605).

993213979 is a wasteful number, since it uses less digits than its factorization.

993213979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692604.

The product of its digits is 826686, while the sum is 52.

The square root of 993213979 is about 31515.2975394490. The cubic root of 993213979 is about 997.7328569467.

The spelling of 993213979 in words is "nine hundred ninety-three million, two hundred thirteen thousand, nine hundred seventy-nine".