15820097 has 2 divisors, whose sum is σ = 15820098. Its totient is φ = 15820096.

The previous prime is 15820093. The next prime is 15820099. The reversal of 15820097 is 79002851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 524176 = 3911^2 + 724^2 .

It is an emirp because it is prime and its reverse (79002851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15820097 - 2² = 15820093 is a prime.

Together with 15820099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15820093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7910048 + 7910049.

It is an arithmetic number, because the mean of its divisors is an integer number (7910049).

Almost surely, 2^15820097 is an apocalyptic number.

It is an amenable number.

15820097 is a deficient number, since it is larger than the sum of its proper divisors (1).

15820097 is an equidigital number, since it uses as much as digits as its factorization.

15820097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 15820097 is about 3977.4485540356. The cubic root of 15820097 is about 251.0362164214.

The spelling of 15820097 in words is "fifteen million, eight hundred twenty thousand, ninety-seven".