993660913 has 4 divisors (see below), whose sum is σ = 1135612480. Its totient is φ = 851709348.

The previous prime is 993660869. The next prime is 993660979. The reversal of 993660913 is 319066399.

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.

It is not a de Polignac number, because 993660913 - 2¹⁷ = 993529841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993666913) 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, 70975773 + ... + 70975786.

It is an arithmetic number, because the mean of its divisors is an integer number (283903120).

Almost surely, 2^993660913 is an apocalyptic number.

It is an amenable number.

993660913 is a deficient number, since it is larger than the sum of its proper divisors (141951567).

993660913 is a wasteful number, since it uses less digits than its factorization.

993660913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141951566.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 993660913 is about 31522.3874888943. The cubic root of 993660913 is about 997.8824903176.

The spelling of 993660913 in words is "nine hundred ninety-three million, six hundred sixty thousand, nine hundred thirteen".