109409281 has 4 divisors (see below), whose sum is σ = 109523392. Its totient is φ = 109295172.

The previous prime is 109409273. The next prime is 109409303. The reversal of 109409281 is 182904901.

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 109409281 - 2³ = 109409273 is a prime.

It is a super-2 number, since 2×109409281² = 23940781537873922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109409221) 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, 55605 + ... + 57538.

It is an arithmetic number, because the mean of its divisors is an integer number (27380848).

Almost surely, 2^109409281 is an apocalyptic number.

It is an amenable number.

109409281 is a deficient number, since it is larger than the sum of its proper divisors (114111).

109409281 is an equidigital number, since it uses as much as digits as its factorization.

109409281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114110.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 109409281 is about 10459.8891485522. The cubic root of 109409281 is about 478.2827540503.

The spelling of 109409281 in words is "one hundred nine million, four hundred nine thousand, two hundred eighty-one".