108997990 has 8 divisors (see below), whose sum is σ = 196196400. Its totient is φ = 43599192.

The previous prime is 108997981. The next prime is 108997997. The reversal of 108997990 is 99799801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108997997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5449890 + ... + 5449909.

It is an arithmetic number, because the mean of its divisors is an integer number (24524550).

Almost surely, 2^108997990 is an apocalyptic number.

108997990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108997990 is a deficient number, since it is larger than the sum of its proper divisors (87198410).

108997990 is a wasteful number, since it uses less digits than its factorization.

108997990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10899806.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 108997990 is about 10440.2102469251. The cubic root of 108997990 is about 477.6826818528.

The spelling of 108997990 in words is "one hundred eight million, nine hundred ninety-seven thousand, nine hundred ninety".