102321493 has 2 divisors, whose sum is σ = 102321494. Its totient is φ = 102321492.

The previous prime is 102321469. The next prime is 102321509. The reversal of 102321493 is 394123201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74252689 + 28068804 = 8617^2 + 5298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102321493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102321433) 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, 51160746 + 51160747.

It is an arithmetic number, because the mean of its divisors is an integer number (51160747).

Almost surely, 2^102321493 is an apocalyptic number.

It is an amenable number.

102321493 is a deficient number, since it is larger than the sum of its proper divisors (1).

102321493 is an equidigital number, since it uses as much as digits as its factorization.

102321493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 102321493 is about 10115.4086916941. The cubic root of 102321493 is about 467.7232472025.

Adding to 102321493 its reverse (394123201), we get a palindrome (496444694).

The spelling of 102321493 in words is "one hundred two million, three hundred twenty-one thousand, four hundred ninety-three".