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13097197 = 22957193
BaseRepresentation
bin110001111101…
…100011101101
3220122101222101
4301331203231
511323102242
61144415101
7216216151
oct61754355
926571871
1013097197
117436133
124477491
132937529
141a4d061
15123a9b7
hexc7d8ed

13097197 has 4 divisors (see below), whose sum is σ = 13154620. Its totient is φ = 13039776.

The previous prime is 13097179. The next prime is 13097209. The reversal of 13097197 is 79179031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79179031 = 543714563.

It can be written as a sum of positive squares in 2 ways, for example, as 12187081 + 910116 = 3491^2 + 954^2 .

It is a cyclic number.

It is not a de Polignac number, because 13097197 - 211 = 13095149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13097177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28368 + ... + 28825.

It is an arithmetic number, because the mean of its divisors is an integer number (3288655).

Almost surely, 213097197 is an apocalyptic number.

It is an amenable number.

13097197 is a deficient number, since it is larger than the sum of its proper divisors (57423).

13097197 is an equidigital number, since it uses as much as digits as its factorization.

13097197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57422.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 13097197 is about 3619.0049737462. The cubic root of 13097197 is about 235.7180212098.

The spelling of 13097197 in words is "thirteen million, ninety-seven thousand, one hundred ninety-seven".

Divisors: 1 229 57193 13097197