1916967817 has 8 divisors (see below), whose sum is σ = 2072398400. Its totient is φ = 1766991024.

The previous prime is 1916967799. The next prime is 1916967823. The reversal of 1916967817 is 7187696191.

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-1916967817 is a prime.

It is a super-2 number, since 2×1916967817² = 7349531222827490978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1916967317) 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, 1362717 + ... + 1364122.

It is an arithmetic number, because the mean of its divisors is an integer number (259049800).

Almost surely, 2^1916967817 is an apocalyptic number.

It is an amenable number.

1916967817 is a deficient number, since it is larger than the sum of its proper divisors (155430583).

1916967817 is a wasteful number, since it uses less digits than its factorization.

1916967817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726895.

The product of its digits is 1143072, while the sum is 55.

The square root of 1916967817 is about 43783.1910326326. The cubic root of 1916967817 is about 1242.2383730958.

The spelling of 1916967817 in words is "one billion, nine hundred sixteen million, nine hundred sixty-seven thousand, eight hundred seventeen".