195271619 has 2 divisors, whose sum is σ = 195271620. Its totient is φ = 195271618.

The previous prime is 195271603. The next prime is 195271621. The reversal of 195271619 is 916172591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195271619 - 2⁴ = 195271603 is a prime.

It is a super-2 number, since 2×195271619² = 76262010373762322, which contains 22 as substring.

Together with 195271621, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (195271019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97635809 + 97635810.

It is an arithmetic number, because the mean of its divisors is an integer number (97635810).

Almost surely, 2^195271619 is an apocalyptic number.

195271619 is a deficient number, since it is larger than the sum of its proper divisors (1).

195271619 is an equidigital number, since it uses as much as digits as its factorization.

195271619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 41.

The square root of 195271619 is about 13973.9621797112. The cubic root of 195271619 is about 580.1581207811.

The spelling of 195271619 in words is "one hundred ninety-five million, two hundred seventy-one thousand, six hundred nineteen".