109571897 has 4 divisors (see below), whose sum is σ = 109683456. Its totient is φ = 109460340.

The previous prime is 109571881. The next prime is 109571933. The reversal of 109571897 is 798175901.

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 109571897 - 2⁴ = 109571881 is a prime.

It is a super-2 number, since 2×109571897² = 24012001224357218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109571827) 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, 54293 + ... + 56274.

It is an arithmetic number, because the mean of its divisors is an integer number (27420864).

Almost surely, 2^109571897 is an apocalyptic number.

It is an amenable number.

109571897 is a deficient number, since it is larger than the sum of its proper divisors (111559).

109571897 is an equidigital number, since it uses as much as digits as its factorization.

109571897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111558.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 109571897 is about 10467.6595760466. The cubic root of 109571897 is about 478.5195954046.

The spelling of 109571897 in words is "one hundred nine million, five hundred seventy-one thousand, eight hundred ninety-seven".