118978749 has 6 divisors (see below), whose sum is σ = 171858206. Its totient is φ = 79319160.

The previous prime is 118978729. The next prime is 118978759. The reversal of 118978749 is 947879811.

It can be written as a sum of positive squares in only one way, i.e., 109056249 + 9922500 = 10443^2 + 3150^2 .

It is not a de Polignac number, because 118978749 - 2⁷ = 118978621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118978695 and 118978704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118978709) 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 5 ways as a sum of consecutive naturals, for example, 6609922 + ... + 6609939.

Almost surely, 2^118978749 is an apocalyptic number.

It is an amenable number.

118978749 is a deficient number, since it is larger than the sum of its proper divisors (52879457).

118978749 is a wasteful number, since it uses less digits than its factorization.

118978749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13219867 (or 13219864 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The square root of 118978749 is about 10907.7380331579. The cubic root of 118978749 is about 491.8391924397.

The spelling of 118978749 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, seven hundred forty-nine".