102697321 has 2 divisors, whose sum is σ = 102697322. Its totient is φ = 102697320.

The previous prime is 102697307. The next prime is 102697339. The reversal of 102697321 is 123796201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55294096 + 47403225 = 7436^2 + 6885^2 .

It is an emirp because it is prime and its reverse (123796201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102697321 - 2⁷ = 102697193 is a prime.

It is equal to p_5907901 and since 102697321 and 5907901 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (102697421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51348660 + 51348661.

It is an arithmetic number, because the mean of its divisors is an integer number (51348661).

Almost surely, 2^102697321 is an apocalyptic number.

It is an amenable number.

102697321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102697321 is an equidigital number, since it uses as much as digits as its factorization.

102697321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 102697321 is about 10133.9686697759. The cubic root of 102697321 is about 468.2951984360.

The spelling of 102697321 in words is "one hundred two million, six hundred ninety-seven thousand, three hundred twenty-one".