116978917 has 4 divisors (see below), whose sum is σ = 127613376. Its totient is φ = 106344460.

The previous prime is 116978891. The next prime is 116978929. The reversal of 116978917 is 719879611.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116978917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116978977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5317213 + ... + 5317234.

It is an arithmetic number, because the mean of its divisors is an integer number (31903344).

Almost surely, 2^116978917 is an apocalyptic number.

It is an amenable number.

116978917 is a deficient number, since it is larger than the sum of its proper divisors (10634459).

116978917 is a wasteful number, since it uses less digits than its factorization.

116978917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634458.

The product of its digits is 190512, while the sum is 49.

The square root of 116978917 is about 10815.6792204651. The cubic root of 116978917 is about 489.0679449975.

The spelling of 116978917 in words is "one hundred sixteen million, nine hundred seventy-eight thousand, nine hundred seventeen".