195748081 has 9 divisors (see below), whose sum is σ = 208192971. Its totient is φ = 184009632.

The previous prime is 195748079. The next prime is 195748097. The reversal of 195748081 is 180847591.

It is a happy number.

The square root of 195748081 is 13991.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 152399025 + 43349056 = 12345^2 + 6584^2 .

It is not a de Polignac number, because 195748081 - 2¹ = 195748079 is a prime.

It is a super-2 number, since 2×195748081² = 76634622430365122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195748381) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 237436 + ... + 238258.

Almost surely, 2^195748081 is an apocalyptic number.

195748081 is the 13991-st square number.

195748081 is the 6996-th centered octagonal number.

It is an amenable number.

195748081 is a deficient number, since it is larger than the sum of its proper divisors (12444890).

195748081 is an frugal number, since it uses more digits than its factorization.

195748081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The cubic root of 195748081 is about 580.6295987157.

The spelling of 195748081 in words is "one hundred ninety-five million, seven hundred forty-eight thousand, eighty-one".