109570861 has 2 divisors, whose sum is σ = 109570862. Its totient is φ = 109570860.

The previous prime is 109570859. The next prime is 109570897. The reversal of 109570861 is 168075901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102313225 + 7257636 = 10115^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 109570861 - 2¹ = 109570859 is a prime.

Together with 109570859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109570861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109570841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54785430 + 54785431.

It is an arithmetic number, because the mean of its divisors is an integer number (54785431).

Almost surely, 2^109570861 is an apocalyptic number.

It is an amenable number.

109570861 is a deficient number, since it is larger than the sum of its proper divisors (1).

109570861 is an equidigital number, since it uses as much as digits as its factorization.

109570861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 109570861 is about 10467.6100901782. The cubic root of 109570861 is about 478.5180872689.

The spelling of 109570861 in words is "one hundred nine million, five hundred seventy thousand, eight hundred sixty-one".