108278649 has 12 divisors (see below), whose sum is σ = 157054612. Its totient is φ = 71884800.

The previous prime is 108278623. The next prime is 108278657. The reversal of 108278649 is 946872801.

It can be written as a sum of positive squares in 2 ways, for example, as 88962624 + 19316025 = 9432^2 + 4395^2 .

It is not a de Polignac number, because 108278649 - 2¹³ = 108270457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108278609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22792 + ... + 27129.

Almost surely, 2^108278649 is an apocalyptic number.

It is an amenable number.

108278649 is a deficient number, since it is larger than the sum of its proper divisors (48775963).

108278649 is a wasteful number, since it uses less digits than its factorization.

108278649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50168 (or 50165 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 108278649 is about 10405.7027153384. The cubic root of 108278649 is about 476.6295265589.

The spelling of 108278649 in words is "one hundred eight million, two hundred seventy-eight thousand, six hundred forty-nine".