115889777 has 2 divisors, whose sum is σ = 115889778. Its totient is φ = 115889776.

The previous prime is 115889743. The next prime is 115889779. The reversal of 115889777 is 777988511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96845281 + 19044496 = 9841^2 + 4364^2 .

It is a cyclic number.

It is not a de Polignac number, because 115889777 - 2²² = 111695473 is a prime.

Together with 115889779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115889779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57944888 + 57944889.

It is an arithmetic number, because the mean of its divisors is an integer number (57944889).

Almost surely, 2^115889777 is an apocalyptic number.

It is an amenable number.

115889777 is a deficient number, since it is larger than the sum of its proper divisors (1).

115889777 is an equidigital number, since it uses as much as digits as its factorization.

115889777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 53.

The square root of 115889777 is about 10765.2114238411. The cubic root of 115889777 is about 487.5453766221.

The spelling of 115889777 in words is "one hundred fifteen million, eight hundred eighty-nine thousand, seven hundred seventy-seven".