195641906 has 4 divisors (see below), whose sum is σ = 293462862. Its totient is φ = 97820952.

The previous prime is 195641893. The next prime is 195641923. The reversal of 195641906 is 609146591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 182385025 + 13256881 = 13505^2 + 3641^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48910475 + ... + 48910478.

Almost surely, 2^195641906 is an apocalyptic number.

195641906 is a deficient number, since it is larger than the sum of its proper divisors (97820956).

195641906 is an equidigital number, since it uses as much as digits as its factorization.

195641906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97820955.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 195641906 is about 13987.2050817881. The cubic root of 195641906 is about 580.5246006712.

The spelling of 195641906 in words is "one hundred ninety-five million, six hundred forty-one thousand, nine hundred six".