102730291 has 2 divisors, whose sum is σ = 102730292. Its totient is φ = 102730290.

The previous prime is 102730289. The next prime is 102730301. The reversal of 102730291 is 192037201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102730291 - 2¹ = 102730289 is a prime.

Together with 102730289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102730091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51365145 + 51365146.

It is an arithmetic number, because the mean of its divisors is an integer number (51365146).

Almost surely, 2^102730291 is an apocalyptic number.

102730291 is a deficient number, since it is larger than the sum of its proper divisors (1).

102730291 is an equidigital number, since it uses as much as digits as its factorization.

102730291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 102730291 is about 10135.5952464569. The cubic root of 102730291 is about 468.3453069834.

Adding to 102730291 its reverse (192037201), we get a palindrome (294767492).

The spelling of 102730291 in words is "one hundred two million, seven hundred thirty thousand, two hundred ninety-one".