195801493 has 2 divisors, whose sum is σ = 195801494. Its totient is φ = 195801492.

The previous prime is 195801443. The next prime is 195801497. The reversal of 195801493 is 394108591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163277284 + 32524209 = 12778^2 + 5703^2 .

It is a cyclic number.

It is not a de Polignac number, because 195801493 - 2¹⁷ = 195670421 is a prime.

It is a super-2 number, since 2×195801493² = 76676449322058098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195801497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97900746 + 97900747.

It is an arithmetic number, because the mean of its divisors is an integer number (97900747).

Almost surely, 2^195801493 is an apocalyptic number.

It is an amenable number.

195801493 is a deficient number, since it is larger than the sum of its proper divisors (1).

195801493 is an equidigital number, since it uses as much as digits as its factorization.

195801493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 195801493 is about 13992.9086683220. The cubic root of 195801493 is about 580.6824042872.

The spelling of 195801493 in words is "one hundred ninety-five million, eight hundred one thousand, four hundred ninety-three".