109520197 has 2 divisors, whose sum is σ = 109520198. Its totient is φ = 109520196.

The previous prime is 109520141. The next prime is 109520219. The reversal of 109520197 is 791025901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95277121 + 14243076 = 9761^2 + 3774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109520197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109520797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54760098 + 54760099.

It is an arithmetic number, because the mean of its divisors is an integer number (54760099).

Almost surely, 2^109520197 is an apocalyptic number.

It is an amenable number.

109520197 is a deficient number, since it is larger than the sum of its proper divisors (1).

109520197 is an equidigital number, since it uses as much as digits as its factorization.

109520197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 109520197 is about 10465.1897737213. The cubic root of 109520197 is about 478.4443225905. Note that the first 3 decimals are identical.

The spelling of 109520197 in words is "one hundred nine million, five hundred twenty thousand, one hundred ninety-seven".