197139896639 has 8 divisors (see below), whose sum is σ = 228665467008. Its totient is φ = 166455008280.

The previous prime is 197139896633. The next prime is 197139896647. The reversal of 197139896639 is 936698931791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197139896639 - 2²⁰ = 197138848063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197139896633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210169997 + ... + 210170934.

It is an arithmetic number, because the mean of its divisors is an integer number (28583183376).

Almost surely, 2^197139896639 is an apocalyptic number.

197139896639 is a deficient number, since it is larger than the sum of its proper divisors (31525570369).

197139896639 is an equidigital number, since it uses as much as digits as its factorization.

197139896639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420341005.

The product of its digits is 119042784, while the sum is 71.

The spelling of 197139896639 in words is "one hundred ninety-seven billion, one hundred thirty-nine million, eight hundred ninety-six thousand, six hundred thirty-nine".