195388387 has 2 divisors, whose sum is σ = 195388388. Its totient is φ = 195388386.

The previous prime is 195388373. The next prime is 195388393. The reversal of 195388387 is 783883591.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195388387 is a prime.

It is not a weakly prime, because it can be changed into another prime (195388337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97694193 + 97694194.

It is an arithmetic number, because the mean of its divisors is an integer number (97694194).

Almost surely, 2^195388387 is an apocalyptic number.

195388387 is a deficient number, since it is larger than the sum of its proper divisors (1).

195388387 is an equidigital number, since it uses as much as digits as its factorization.

195388387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The square root of 195388387 is about 13978.1396115506. The cubic root of 195388387 is about 580.2737382053.

The spelling of 195388387 in words is "one hundred ninety-five million, three hundred eighty-eight thousand, three hundred eighty-seven".