195161389 has 2 divisors, whose sum is σ = 195161390. Its totient is φ = 195161388.

The previous prime is 195161333. The next prime is 195161429. The reversal of 195161389 is 983161591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175430025 + 19731364 = 13245^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 195161389 - 2⁷ = 195161261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195162389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97580694 + 97580695.

It is an arithmetic number, because the mean of its divisors is an integer number (97580695).

Almost surely, 2^195161389 is an apocalyptic number.

It is an amenable number.

195161389 is a deficient number, since it is larger than the sum of its proper divisors (1).

195161389 is an equidigital number, since it uses as much as digits as its factorization.

195161389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 195161389 is about 13970.0175017786. The cubic root of 195161389 is about 580.0489346346.

The spelling of 195161389 in words is "one hundred ninety-five million, one hundred sixty-one thousand, three hundred eighty-nine".