108172387 has 2 divisors, whose sum is σ = 108172388. Its totient is φ = 108172386.

The previous prime is 108172373. The next prime is 108172397. The reversal of 108172387 is 783271801.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108172387 is a prime.

It is not a weakly prime, because it can be changed into another prime (108172307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54086193 + 54086194.

It is an arithmetic number, because the mean of its divisors is an integer number (54086194).

Almost surely, 2^108172387 is an apocalyptic number.

108172387 is a deficient number, since it is larger than the sum of its proper divisors (1).

108172387 is an equidigital number, since it uses as much as digits as its factorization.

108172387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 108172387 is about 10400.5955117964. The cubic root of 108172387 is about 476.4735580328.

The spelling of 108172387 in words is "one hundred eight million, one hundred seventy-two thousand, three hundred eighty-seven".