118777777 has 4 divisors (see below), whose sum is σ = 119441520. Its totient is φ = 118114036.

The previous prime is 118777693. The next prime is 118777783. The reversal of 118777777 is 777777811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 777777811 = 83 ⋅9370817.

It is a cyclic number.

It is not a de Polignac number, because 118777777 - 2¹⁵ = 118745009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118777787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331603 + ... + 331960.

It is an arithmetic number, because the mean of its divisors is an integer number (29860380).

Almost surely, 2^118777777 is an apocalyptic number.

It is an amenable number.

118777777 is a deficient number, since it is larger than the sum of its proper divisors (663743).

118777777 is an equidigital number, since it uses as much as digits as its factorization.

118777777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663742.

The product of its digits is 941192, while the sum is 52.

The square root of 118777777 is about 10898.5217804985. The cubic root of 118777777 is about 491.5621076263.

The spelling of 118777777 in words is "one hundred eighteen million, seven hundred seventy-seven thousand, seven hundred seventy-seven".