1016671993 has 8 divisors (see below), whose sum is σ = 1045779840. Its totient is φ = 987875760.

The previous prime is 1016671987. The next prime is 1016672089. The reversal of 1016671993 is 3991766101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016671993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016671973) 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, 71278 + ... + 84343.

It is an arithmetic number, because the mean of its divisors is an integer number (130722480).

Almost surely, 2^1016671993 is an apocalyptic number.

It is an amenable number.

1016671993 is a deficient number, since it is larger than the sum of its proper divisors (29107847).

1016671993 is a wasteful number, since it uses less digits than its factorization.

1016671993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155807.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 1016671993 is about 31885.2943063099. The cubic root of 1016671993 is about 1005.5267299848.

The spelling of 1016671993 in words is "one billion, sixteen million, six hundred seventy-one thousand, nine hundred ninety-three".