109897990 has 16 divisors (see below), whose sum is σ = 198204048. Its totient is φ = 43873056.

The previous prime is 109897973. The next prime is 109898003. The reversal of 109897990 is 99798901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5277 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (12387753).

Almost surely, 2^109897990 is an apocalyptic number.

109897990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109897990 is a deficient number, since it is larger than the sum of its proper divisors (88306058).

109897990 is a wasteful number, since it uses less digits than its factorization.

109897990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21543.

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

The square root of 109897990 is about 10483.2242177681. The cubic root of 109897990 is about 478.9938269464.

The spelling of 109897990 in words is "one hundred nine million, eight hundred ninety-seven thousand, nine hundred ninety".