196619961 has 16 divisors (see below), whose sum is σ = 283419200. Its totient is φ = 120823488.

The previous prime is 196619959. The next prime is 196619963. The reversal of 196619961 is 169916691.

It is an interprime number because it is at equal distance from previous prime (196619959) and next prime (196619963).

It is not a de Polignac number, because 196619961 - 2¹ = 196619959 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

196619961 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 196619961.

It is not an unprimeable number, because it can be changed into a prime (196619963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44506 + ... + 48723.

It is an arithmetic number, because the mean of its divisors is an integer number (17713700).

Almost surely, 2^196619961 is an apocalyptic number.

It is an amenable number.

196619961 is a deficient number, since it is larger than the sum of its proper divisors (86799239).

196619961 is a wasteful number, since it uses less digits than its factorization.

196619961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93288.

The product of its digits is 157464, while the sum is 48.

The square root of 196619961 is about 14022.1239831917. The cubic root of 196619961 is about 581.4903812312.

The spelling of 196619961 in words is "one hundred ninety-six million, six hundred nineteen thousand, nine hundred sixty-one".