196012639 has 2 divisors, whose sum is σ = 196012640. Its totient is φ = 196012638.

The previous prime is 196012637. The next prime is 196012673. The reversal of 196012639 is 936210691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196012639 - 2¹ = 196012637 is a prime.

Together with 196012637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 196012598 and 196012607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196012631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98006319 + 98006320.

It is an arithmetic number, because the mean of its divisors is an integer number (98006320).

Almost surely, 2^196012639 is an apocalyptic number.

196012639 is a deficient number, since it is larger than the sum of its proper divisors (1).

196012639 is an equidigital number, since it uses as much as digits as its factorization.

196012639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 196012639 is about 14000.4513855804. The cubic root of 196012639 is about 580.8910590137.

The spelling of 196012639 in words is "one hundred ninety-six million, twelve thousand, six hundred thirty-nine".