195072061 has 2 divisors, whose sum is σ = 195072062. Its totient is φ = 195072060.

The previous prime is 195072011. The next prime is 195072071. The reversal of 195072061 is 160270591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123076836 + 71995225 = 11094^2 + 8485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195072061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195072001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97536030 + 97536031.

It is an arithmetic number, because the mean of its divisors is an integer number (97536031).

Almost surely, 2^195072061 is an apocalyptic number.

It is an amenable number.

195072061 is a deficient number, since it is larger than the sum of its proper divisors (1).

195072061 is an equidigital number, since it uses as much as digits as its factorization.

195072061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 195072061 is about 13966.8200031360. The cubic root of 195072061 is about 579.9604223886.

The spelling of 195072061 in words is "one hundred ninety-five million, seventy-two thousand, sixty-one".