195389240397 has 32 divisors (see below), whose sum is σ = 289205414400. Its totient is φ = 116557885440.

The previous prime is 195389240383. The next prime is 195389240411. The reversal of 195389240397 is 793042983591.

It is an interprime number because it is at equal distance from previous prime (195389240383) and next prime (195389240411).

It is not a de Polignac number, because 195389240397 - 2⁷ = 195389240269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195389240397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195389240897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141229 + ... + 640877.

It is an arithmetic number, because the mean of its divisors is an integer number (9037669200).

Almost surely, 2^195389240397 is an apocalyptic number.

It is an amenable number.

195389240397 is a deficient number, since it is larger than the sum of its proper divisors (93816174003).

195389240397 is a wasteful number, since it uses less digits than its factorization.

195389240397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499973.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 195389240397 in words is "one hundred ninety-five billion, three hundred eighty-nine million, two hundred forty thousand, three hundred ninety-seven".