993797998 has 4 divisors (see below), whose sum is σ = 1490697000. Its totient is φ = 496898998.

The previous prime is 993797971. The next prime is 993797999. The reversal of 993797998 is 899797399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899797399 = 16903 ⋅53233.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993797999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248449498 + ... + 248449501.

It is an arithmetic number, because the mean of its divisors is an integer number (372674250).

Almost surely, 2^993797998 is an apocalyptic number.

993797998 is a deficient number, since it is larger than the sum of its proper divisors (496899002).

993797998 is a wasteful number, since it uses less digits than its factorization.

993797998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496899001.

The product of its digits is 69441624, while the sum is 70.

The square root of 993797998 is about 31524.5618209040. The cubic root of 993797998 is about 997.9283773431.

The spelling of 993797998 in words is "nine hundred ninety-three million, seven hundred ninety-seven thousand, nine hundred ninety-eight".