196631961 has 16 divisors (see below), whose sum is σ = 267618816. Its totient is φ = 128375936.

The previous prime is 196631959. The next prime is 196631987. The reversal of 196631961 is 169136691.

It is a cyclic number.

It is not a de Polignac number, because 196631961 - 2¹ = 196631959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196641961) 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, 136501 + ... + 137933.

It is an arithmetic number, because the mean of its divisors is an integer number (16726176).

Almost surely, 2^196631961 is an apocalyptic number.

It is an amenable number.

196631961 is a deficient number, since it is larger than the sum of its proper divisors (70986855).

196631961 is a wasteful number, since it uses less digits than its factorization.

196631961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its digits is 52488, while the sum is 42.

The square root of 196631961 is about 14022.5518718955. The cubic root of 196631961 is about 581.5022107229.

The spelling of 196631961 in words is "one hundred ninety-six million, six hundred thirty-one thousand, nine hundred sixty-one".