196709609 has 4 divisors (see below), whose sum is σ = 198450516. Its totient is φ = 194968704.

The previous prime is 196709587. The next prime is 196709627. The reversal of 196709609 is 906907691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906907691 = 29 ⋅31272679.

It can be written as a sum of positive squares in 2 ways, for example, as 85618009 + 111091600 = 9253^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 196709609 - 2¹² = 196705513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196709629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870284 + ... + 870509.

It is an arithmetic number, because the mean of its divisors is an integer number (49612629).

Almost surely, 2^196709609 is an apocalyptic number.

It is an amenable number.

196709609 is a deficient number, since it is larger than the sum of its proper divisors (1740907).

196709609 is a wasteful number, since it uses less digits than its factorization.

196709609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740906.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 196709609 is about 14025.3202815479. The cubic root of 196709609 is about 581.5787437906.

The spelling of 196709609 in words is "one hundred ninety-six million, seven hundred nine thousand, six hundred nine".