102055399 has 2 divisors, whose sum is σ = 102055400. Its totient is φ = 102055398.

The previous prime is 102055397. The next prime is 102055409. The reversal of 102055399 is 993550201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102055399 - 2¹ = 102055397 is a prime.

Together with 102055397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102055391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51027699 + 51027700.

It is an arithmetic number, because the mean of its divisors is an integer number (51027700).

Almost surely, 2^102055399 is an apocalyptic number.

102055399 is a deficient number, since it is larger than the sum of its proper divisors (1).

102055399 is an equidigital number, since it uses as much as digits as its factorization.

102055399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 102055399 is about 10102.2472252465. The cubic root of 102055399 is about 467.3174465257.

The spelling of 102055399 in words is "one hundred two million, fifty-five thousand, three hundred ninety-nine".