1005078913 has 8 divisors (see below), whose sum is σ = 1064804832. Its totient is φ = 945420096.

The previous prime is 1005078901. The next prime is 1005078917. The reversal of 1005078913 is 3198705001.

It is a happy number.

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 1005078913 - 2⁵ = 1005078881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005078917) 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, 15906 + ... + 47572.

It is an arithmetic number, because the mean of its divisors is an integer number (133100604).

Almost surely, 2^1005078913 is an apocalyptic number.

It is an amenable number.

1005078913 is a deficient number, since it is larger than the sum of its proper divisors (59725919).

1005078913 is a wasteful number, since it uses less digits than its factorization.

1005078913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33551.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 1005078913 is about 31702.9795602874. The cubic root of 1005078913 is about 1001.6901129091.

The spelling of 1005078913 in words is "one billion, five million, seventy-eight thousand, nine hundred thirteen".