195031397 has 8 divisors (see below), whose sum is σ = 213436512. Its totient is φ = 176738800.

The previous prime is 195031387. The next prime is 195031453. The reversal of 195031397 is 793130591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195031397 - 2⁴ = 195031381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195031397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195031367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24479 + ... + 31452.

It is an arithmetic number, because the mean of its divisors is an integer number (26679564).

Almost surely, 2^195031397 is an apocalyptic number.

It is an amenable number.

195031397 is a deficient number, since it is larger than the sum of its proper divisors (18405115).

195031397 is a wasteful number, since it uses less digits than its factorization.

195031397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56259.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 195031397 is about 13965.3641914559. The cubic root of 195031397 is about 579.9201207869.

The spelling of 195031397 in words is "one hundred ninety-five million, thirty-one thousand, three hundred ninety-seven".