195307397 has 2 divisors, whose sum is σ = 195307398. Its totient is φ = 195307396.

The previous prime is 195307381. The next prime is 195307447. The reversal of 195307397 is 793703591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140161921 + 55145476 = 11839^2 + 7426^2 .

It is a cyclic number.

It is not a de Polignac number, because 195307397 - 2⁴ = 195307381 is a prime.

It is a super-3 number, since 3×195307397³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195307097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97653698 + 97653699.

It is an arithmetic number, because the mean of its divisors is an integer number (97653699).

Almost surely, 2^195307397 is an apocalyptic number.

It is an amenable number.

195307397 is a deficient number, since it is larger than the sum of its proper divisors (1).

195307397 is an equidigital number, since it uses as much as digits as its factorization.

195307397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 178605, while the sum is 44.

The square root of 195307397 is about 13975.2422877029. The cubic root of 195307397 is about 580.1935511383.

The spelling of 195307397 in words is "one hundred ninety-five million, three hundred seven thousand, three hundred ninety-seven".