108642997 has 4 divisors (see below), whose sum is σ = 108693760. Its totient is φ = 108592236.

The previous prime is 108642977. The next prime is 108643009. The reversal of 108642997 is 799246801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108642997 - 2¹¹ = 108640949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108642917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22023 + ... + 26500.

It is an arithmetic number, because the mean of its divisors is an integer number (27173440).

Almost surely, 2^108642997 is an apocalyptic number.

It is an amenable number.

108642997 is a deficient number, since it is larger than the sum of its proper divisors (50763).

108642997 is an equidigital number, since it uses as much as digits as its factorization.

108642997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50762.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 108642997 is about 10423.1951435248. The cubic root of 108642997 is about 477.1635333315.

It can be divided in two parts, 10864 and 2997, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 108642997 in words is "one hundred eight million, six hundred forty-two thousand, nine hundred ninety-seven".