109499421 has 4 divisors (see below), whose sum is σ = 145999232. Its totient is φ = 72999612.

The previous prime is 109499407. The next prime is 109499441. The reversal of 109499421 is 124994901.

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 not a de Polignac number, because 109499421 - 2¹¹ = 109497373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109499421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109499441) 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 in 3 ways as a sum of consecutive naturals, for example, 18249901 + ... + 18249906.

It is an arithmetic number, because the mean of its divisors is an integer number (36499808).

Almost surely, 2^109499421 is an apocalyptic number.

It is an amenable number.

109499421 is a deficient number, since it is larger than the sum of its proper divisors (36499811).

109499421 is an equidigital number, since it uses as much as digits as its factorization.

109499421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36499810.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 109499421 is about 10464.1971025015. The cubic root of 109499421 is about 478.4140670208.

The spelling of 109499421 in words is "one hundred nine million, four hundred ninety-nine thousand, four hundred twenty-one".