196538961 has 4 divisors (see below), whose sum is σ = 262051952. Its totient is φ = 131025972.

The previous prime is 196538959. The next prime is 196538963. The reversal of 196538961 is 169835691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (196538959) and next prime (196538963).

It is not a de Polignac number, because 196538961 - 2¹ = 196538959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196538961.

It is not an unprimeable number, because it can be changed into a prime (196538963) 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, 32756491 + ... + 32756496.

It is an arithmetic number, because the mean of its divisors is an integer number (65512988).

Almost surely, 2^196538961 is an apocalyptic number.

It is an amenable number.

196538961 is a deficient number, since it is larger than the sum of its proper divisors (65512991).

196538961 is an equidigital number, since it uses as much as digits as its factorization.

196538961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65512990.

The product of its digits is 349920, while the sum is 48.

The square root of 196538961 is about 14019.2353928451. The cubic root of 196538961 is about 581.4105195697.

The spelling of 196538961 in words is "one hundred ninety-six million, five hundred thirty-eight thousand, nine hundred sixty-one".