108978218 has 4 divisors (see below), whose sum is σ = 163467330. Its totient is φ = 54489108.

The previous prime is 108978197. The next prime is 108978227. The reversal of 108978218 is 812879801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812879801 = 647 ⋅1256383.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 44930209 = 8003^2 + 6703^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27244553 + ... + 27244556.

Almost surely, 2^108978218 is an apocalyptic number.

108978218 is a deficient number, since it is larger than the sum of its proper divisors (54489112).

108978218 is an equidigital number, since it uses as much as digits as its factorization.

108978218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54489111.

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 108978218 is about 10439.2632881827. The cubic root of 108978218 is about 477.6537965705.

The spelling of 108978218 in words is "one hundred eight million, nine hundred seventy-eight thousand, two hundred eighteen".