108213709 has 2 divisors, whose sum is σ = 108213710. Its totient is φ = 108213708.

The previous prime is 108213631. The next prime is 108213713. The reversal of 108213709 is 907312801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59521225 + 48692484 = 7715^2 + 6978^2 .

It is an emirp because it is prime and its reverse (907312801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108213709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108213739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54106854 + 54106855.

It is an arithmetic number, because the mean of its divisors is an integer number (54106855).

Almost surely, 2^108213709 is an apocalyptic number.

It is an amenable number.

108213709 is a deficient number, since it is larger than the sum of its proper divisors (1).

108213709 is an equidigital number, since it uses as much as digits as its factorization.

108213709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 108213709 is about 10402.5818429849. The cubic root of 108213709 is about 476.5342214929.

The spelling of 108213709 in words is "one hundred eight million, two hundred thirteen thousand, seven hundred nine".