109569897 has 6 divisors (see below), whose sum is σ = 158267642. Its totient is φ = 73046592.

The previous prime is 109569893. The next prime is 109569923. The reversal of 109569897 is 798965901.

It can be written as a sum of positive squares in only one way, i.e., 88003161 + 21566736 = 9381^2 + 4644^2 .

It is not a de Polignac number, because 109569897 - 2² = 109569893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109569893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6087208 + ... + 6087225.

Almost surely, 2^109569897 is an apocalyptic number.

It is an amenable number.

109569897 is a deficient number, since it is larger than the sum of its proper divisors (48697745).

109569897 is a wasteful number, since it uses less digits than its factorization.

109569897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12174439 (or 12174436 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 109569897 is about 10467.5640432720. The cubic root of 109569897 is about 478.5166839372.

The spelling of 109569897 in words is "one hundred nine million, five hundred sixty-nine thousand, eight hundred ninety-seven".