196201639 has 4 divisors (see below), whose sum is σ = 201504424. Its totient is φ = 190898856.

The previous prime is 196201637. The next prime is 196201667. The reversal of 196201639 is 936102691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 196201639 - 2¹ = 196201637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 5302747 = 196201639 / (1 + 9 + 6 + 2 + 0 + 1 + 6 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 196201598 and 196201607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196201631) 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, 2651337 + ... + 2651410.

It is an arithmetic number, because the mean of its divisors is an integer number (50376106).

Almost surely, 2^196201639 is an apocalyptic number.

196201639 is a deficient number, since it is larger than the sum of its proper divisors (5302785).

196201639 is an equidigital number, since it uses as much as digits as its factorization.

196201639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302784.

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

The square root of 196201639 is about 14007.1995416643. The cubic root of 196201639 is about 581.0777019818.

The spelling of 196201639 in words is "one hundred ninety-six million, two hundred one thousand, six hundred thirty-nine".