116691919 has 4 divisors (see below), whose sum is σ = 116970840. Its totient is φ = 116413000.

The previous prime is 116691917. The next prime is 116691923. The reversal of 116691919 is 919196611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 116691919 - 2¹ = 116691917 is a prime.

It is a super-2 number, since 2×116691919² = 27234007919805122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116691917) 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, 138832 + ... + 139669.

It is an arithmetic number, because the mean of its divisors is an integer number (29242710).

Almost surely, 2^116691919 is an apocalyptic number.

116691919 is a deficient number, since it is larger than the sum of its proper divisors (278921).

116691919 is an equidigital number, since it uses as much as digits as its factorization.

116691919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278920.

The product of its digits is 26244, while the sum is 43.

The square root of 116691919 is about 10802.4033899869. The cubic root of 116691919 is about 488.6676550113.

The spelling of 116691919 in words is "one hundred sixteen million, six hundred ninety-one thousand, nine hundred nineteen".