993679990 has 16 divisors (see below), whose sum is σ = 1790435952. Its totient is φ = 397069344.

The previous prime is 993679979. The next prime is 993679997. The reversal of 993679990 is 99976399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993679997) 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, 39864 + ... + 59803.

It is an arithmetic number, because the mean of its divisors is an integer number (111902247).

Almost surely, 2^993679990 is an apocalyptic number.

993679990 is a deficient number, since it is larger than the sum of its proper divisors (796755962).

993679990 is a wasteful number, since it uses less digits than its factorization.

993679990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100671.

The product of its (nonzero) digits is 7440174, while the sum is 61.

The square root of 993679990 is about 31522.6900819077. The cubic root of 993679990 is about 997.8888762930. Note that the first 4 decimals are identical.

The spelling of 993679990 in words is "nine hundred ninety-three million, six hundred seventy-nine thousand, nine hundred ninety".