993836931209 has 4 divisors (see below), whose sum is σ = 993840351504. Its totient is φ = 993833510916.

The previous prime is 993836931193. The next prime is 993836931221. The reversal of 993836931209 is 902139638399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902139638399 = 113 ⋅7983536623.

It is a cyclic number.

It is not a de Polignac number, because 993836931209 - 2⁴ = 993836931193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993836939209) 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, 1229207 + ... + 1870460.

It is an arithmetic number, because the mean of its divisors is an integer number (248460087876).

Almost surely, 2^993836931209 is an apocalyptic number.

It is an amenable number.

993836931209 is a deficient number, since it is larger than the sum of its proper divisors (3420295).

993836931209 is a wasteful number, since it uses less digits than its factorization.

993836931209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420294.

The product of its (nonzero) digits is 17006112, while the sum is 62.

The spelling of 993836931209 in words is "nine hundred ninety-three billion, eight hundred thirty-six million, nine hundred thirty-one thousand, two hundred nine".