913919993 has 8 divisors (see below), whose sum is σ = 1049042880. Its totient is φ = 779937840.

The previous prime is 913919989. The next prime is 913920001. The reversal of 913919993 is 399919319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 913919993 - 2² = 913919989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913919593) 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, 283463 + ... + 286668.

It is an arithmetic number, because the mean of its divisors is an integer number (131130360).

Almost surely, 2^913919993 is an apocalyptic number.

It is an amenable number.

913919993 is a deficient number, since it is larger than the sum of its proper divisors (135122887).

913919993 is a wasteful number, since it uses less digits than its factorization.

913919993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570367.

The product of its digits is 531441, while the sum is 53.

The square root of 913919993 is about 30231.1096885311. The cubic root of 913919993 is about 970.4415720781.

The spelling of 913919993 in words is "nine hundred thirteen million, nine hundred nineteen thousand, nine hundred ninety-three".