102310391 has 2 divisors, whose sum is σ = 102310392. Its totient is φ = 102310390.

The previous prime is 102310387. The next prime is 102310423. The reversal of 102310391 is 193013201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102310391 - 2² = 102310387 is a prime.

It is a super-2 number, since 2×102310391² = 20934832213145762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102310321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51155195 + 51155196.

It is an arithmetic number, because the mean of its divisors is an integer number (51155196).

Almost surely, 2^102310391 is an apocalyptic number.

102310391 is a deficient number, since it is larger than the sum of its proper divisors (1).

102310391 is an equidigital number, since it uses as much as digits as its factorization.

102310391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 102310391 is about 10114.8599100531. The cubic root of 102310391 is about 467.7063304201.

Adding to 102310391 its reverse (193013201), we get a palindrome (295323592).

The spelling of 102310391 in words is "one hundred two million, three hundred ten thousand, three hundred ninety-one".