109645397 has 2 divisors, whose sum is σ = 109645398. Its totient is φ = 109645396.

The previous prime is 109645391. The next prime is 109645441. The reversal of 109645397 is 793546901.

It is an a-pointer prime, because the next prime (109645441) can be obtained adding 109645397 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109537156 + 108241 = 10466^2 + 329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109645397 is a prime.

It is a super-2 number, since 2×109645397² = 24044226166575218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109645391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54822698 + 54822699.

It is an arithmetic number, because the mean of its divisors is an integer number (54822699).

Almost surely, 2^109645397 is an apocalyptic number.

It is an amenable number.

109645397 is a deficient number, since it is larger than the sum of its proper divisors (1).

109645397 is an equidigital number, since it uses as much as digits as its factorization.

109645397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 109645397 is about 10471.1698009344. The cubic root of 109645397 is about 478.6265672650.

It can be divided in two parts, 10964 and 5397, that added together give a palindrome (16361).

The spelling of 109645397 in words is "one hundred nine million, six hundred forty-five thousand, three hundred ninety-seven".