196407139 has 4 divisors (see below), whose sum is σ = 197820280. Its totient is φ = 194994000.

The previous prime is 196407119. The next prime is 196407163. The reversal of 196407139 is 931704691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196407139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196407109) 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, 706362 + ... + 706639.

It is an arithmetic number, because the mean of its divisors is an integer number (49455070).

Almost surely, 2^196407139 is an apocalyptic number.

196407139 is a deficient number, since it is larger than the sum of its proper divisors (1413141).

196407139 is a wasteful number, since it uses less digits than its factorization.

196407139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413140.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 196407139 is about 14014.5331352850. The cubic root of 196407139 is about 581.2805032129.

The spelling of 196407139 in words is "one hundred ninety-six million, four hundred seven thousand, one hundred thirty-nine".