102406393 has 2 divisors, whose sum is σ = 102406394. Its totient is φ = 102406392.

The previous prime is 102406387. The next prime is 102406429. The reversal of 102406393 is 393604201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77933584 + 24472809 = 8828^2 + 4947^2 .

It is an emirp because it is prime and its reverse (393604201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102406393 - 2⁹ = 102405881 is a prime.

It is not a weakly prime, because it can be changed into another prime (102406303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51203196 + 51203197.

It is an arithmetic number, because the mean of its divisors is an integer number (51203197).

Almost surely, 2^102406393 is an apocalyptic number.

It is an amenable number.

102406393 is a deficient number, since it is larger than the sum of its proper divisors (1).

102406393 is an equidigital number, since it uses as much as digits as its factorization.

102406393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 102406393 is about 10119.6043895006. The cubic root of 102406393 is about 467.8525739768.

The spelling of 102406393 in words is "one hundred two million, four hundred six thousand, three hundred ninety-three".