195864469 has 2 divisors, whose sum is σ = 195864470. Its totient is φ = 195864468.

The previous prime is 195864467. The next prime is 195864499. The reversal of 195864469 is 964468591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140138244 + 55726225 = 11838^2 + 7465^2 .

It is a cyclic number.

It is not a de Polignac number, because 195864469 - 2¹ = 195864467 is a prime.

It is a super-2 number, since 2×195864469² = 76725780433303922, which contains 22 as substring.

Together with 195864467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195864467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97932234 + 97932235.

It is an arithmetic number, because the mean of its divisors is an integer number (97932235).

Almost surely, 2^195864469 is an apocalyptic number.

It is an amenable number.

195864469 is a deficient number, since it is larger than the sum of its proper divisors (1).

195864469 is an equidigital number, since it uses as much as digits as its factorization.

195864469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The square root of 195864469 is about 13995.1587700890. The cubic root of 195864469 is about 580.7446529362.

The spelling of 195864469 in words is "one hundred ninety-five million, eight hundred sixty-four thousand, four hundred sixty-nine".