111677999 has 2 divisors, whose sum is σ = 111678000. Its totient is φ = 111677998.

The previous prime is 111677987. The next prime is 111678011. The reversal of 111677999 is 999776111.

It is a balanced prime because it is at equal distance from previous prime (111677987) and next prime (111678011).

It is an emirp because it is prime and its reverse (999776111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111677999 - 2²⁰ = 110629423 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111677899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55838999 + 55839000.

It is an arithmetic number, because the mean of its divisors is an integer number (55839000).

Almost surely, 2^111677999 is an apocalyptic number.

111677999 is a deficient number, since it is larger than the sum of its proper divisors (1).

111677999 is an equidigital number, since it uses as much as digits as its factorization.

111677999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 50.

The square root of 111677999 is about 10567.7811767655. The cubic root of 111677999 is about 481.5660640590.

The spelling of 111677999 in words is "one hundred eleven million, six hundred seventy-seven thousand, nine hundred ninety-nine".