195406945 has 8 divisors (see below), whose sum is σ = 236564136. Its totient is φ = 154941696.

The previous prime is 195406933. The next prime is 195406957. The reversal of 195406945 is 549604591.

195406945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (195406933) and next prime (195406957).

It can be written as a sum of positive squares in 4 ways, for example, as 3972049 + 191434896 = 1993^2 + 13836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195406945 - 2⁹ = 195406433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172362 + ... + 173491.

It is an arithmetic number, because the mean of its divisors is an integer number (29570517).

Almost surely, 2^195406945 is an apocalyptic number.

It is an amenable number.

195406945 is a deficient number, since it is larger than the sum of its proper divisors (41157191).

195406945 is a wasteful number, since it uses less digits than its factorization.

195406945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345971.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 195406945 is about 13978.8034180326. The cubic root of 195406945 is about 580.2921091011.

The spelling of 195406945 in words is "one hundred ninety-five million, four hundred six thousand, nine hundred forty-five".