195697031 has 2 divisors, whose sum is σ = 195697032. Its totient is φ = 195697030.

The previous prime is 195697009. The next prime is 195697037. The reversal of 195697031 is 130796591.

195697031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195697031 is a prime.

It is a super-2 number, since 2×195697031² = 76594655884429922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 195697031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195697037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97848515 + 97848516.

It is an arithmetic number, because the mean of its divisors is an integer number (97848516).

Almost surely, 2^195697031 is an apocalyptic number.

195697031 is a deficient number, since it is larger than the sum of its proper divisors (1).

195697031 is an equidigital number, since it uses as much as digits as its factorization.

195697031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 195697031 is about 13989.1754939310. The cubic root of 195697031 is about 580.5791193479.

The spelling of 195697031 in words is "one hundred ninety-five million, six hundred ninety-seven thousand, thirty-one".