196387639 has 12 divisors (see below), whose sum is σ = 238384944. Its totient is φ = 161012544.

The previous prime is 196387619. The next prime is 196387649. The reversal of 196387639 is 936783691.

It is not a de Polignac number, because 196387639 - 2¹⁵ = 196354871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196387619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86002 + ... + 88255.

It is an arithmetic number, because the mean of its divisors is an integer number (19865412).

Almost surely, 2^196387639 is an apocalyptic number.

196387639 is a deficient number, since it is larger than the sum of its proper divisors (41997305).

196387639 is a wasteful number, since it uses less digits than its factorization.

196387639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174294 (or 174287 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 52.

The square root of 196387639 is about 14013.8374116442. The cubic root of 196387639 is about 581.2612653769.

The spelling of 196387639 in words is "one hundred ninety-six million, three hundred eighty-seven thousand, six hundred thirty-nine".