196138969 has 4 divisors (see below), whose sum is σ = 211226596. Its totient is φ = 181051344.

The previous prime is 196138967. The next prime is 196138993. The reversal of 196138969 is 969831691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 129504400 + 66634569 = 11380^2 + 8163^2 .

It is a cyclic number.

It is not a de Polignac number, because 196138969 - 2¹ = 196138967 is a prime.

It is a super-2 number, since 2×196138969² = 76940990320765922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196138967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7543794 + ... + 7543819.

It is an arithmetic number, because the mean of its divisors is an integer number (52806649).

Almost surely, 2^196138969 is an apocalyptic number.

It is an amenable number.

196138969 is a deficient number, since it is larger than the sum of its proper divisors (15087627).

196138969 is a wasteful number, since it uses less digits than its factorization.

196138969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15087626.

The product of its digits is 629856, while the sum is 52.

The square root of 196138969 is about 14004.9622991281. The cubic root of 196138969 is about 581.0158268317.

It can be divided in two parts, 19613 and 8969, that added together give a palindrome (28582).

The spelling of 196138969 in words is "one hundred ninety-six million, one hundred thirty-eight thousand, nine hundred sixty-nine".