195091423 has 2 divisors, whose sum is σ = 195091424. Its totient is φ = 195091422.

The previous prime is 195091409. The next prime is 195091433. The reversal of 195091423 is 324190591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195091423 - 2²¹ = 192994271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195091433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97545711 + 97545712.

It is an arithmetic number, because the mean of its divisors is an integer number (97545712).

Almost surely, 2^195091423 is an apocalyptic number.

195091423 is a deficient number, since it is larger than the sum of its proper divisors (1).

195091423 is an equidigital number, since it uses as much as digits as its factorization.

195091423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 195091423 is about 13967.5131286854. The cubic root of 195091423 is about 579.9796098658.

The spelling of 195091423 in words is "one hundred ninety-five million, ninety-one thousand, four hundred twenty-three".