109990661 has 8 divisors (see below), whose sum is σ = 120135744. Its totient is φ = 99869920.

The previous prime is 109990651. The next prime is 109990681. The reversal of 109990661 is 166099901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109990661 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 (109990631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 15393.

It is an arithmetic number, because the mean of its divisors is an integer number (15016968).

Almost surely, 2^109990661 is an apocalyptic number.

109990661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

109990661 is a deficient number, since it is larger than the sum of its proper divisors (10145083).

109990661 is a wasteful number, since it uses less digits than its factorization.

109990661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 109990661 is about 10487.6432528953. The cubic root of 109990661 is about 479.1284256043.

The spelling of 109990661 in words is "one hundred nine million, nine hundred ninety thousand, six hundred sixty-one".