10219997 has 2 divisors, whose sum is σ = 10219998. Its totient is φ = 10219996.

The previous prime is 10219991. The next prime is 10219999. The reversal of 10219997 is 79991201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7695076 + 2524921 = 2774^2 + 1589^2 .

It is a cyclic number.

It is not a de Polignac number, because 10219997 - 2⁶ = 10219933 is a prime.

Together with 10219999, 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 10219997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10219991) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5109998 + 5109999.

It is an arithmetic number, because the mean of its divisors is an integer number (5109999).

Almost surely, 2^10219997 is an apocalyptic number.

It is an amenable number.

10219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10219997 is an equidigital number, since it uses as much as digits as its factorization.

10219997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 10219997 is about 3196.8730034207. The cubic root of 10219997 is about 217.0119200344.

The spelling of 10219997 in words is "ten million, two hundred nineteen thousand, nine hundred ninety-seven".