108309749 has 2 divisors, whose sum is σ = 108309750. Its totient is φ = 108309748.

The previous prime is 108309743. The next prime is 108309769. The reversal of 108309749 is 947903801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107640625 + 669124 = 10375^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 108309749 - 2¹² = 108305653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108309743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54154874 + 54154875.

It is an arithmetic number, because the mean of its divisors is an integer number (54154875).

Almost surely, 2^108309749 is an apocalyptic number.

It is an amenable number.

108309749 is a deficient number, since it is larger than the sum of its proper divisors (1).

108309749 is an equidigital number, since it uses as much as digits as its factorization.

108309749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 108309749 is about 10407.1969809358. The cubic root of 108309749 is about 476.6751550045.

The spelling of 108309749 in words is "one hundred eight million, three hundred nine thousand, seven hundred forty-nine".