139607891197 has 4 divisors (see below), whose sum is σ = 143012961756. Its totient is φ = 136202820640.

The previous prime is 139607891173. The next prime is 139607891201. The reversal of 139607891197 is 791198706931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45690772516 + 93917118681 = 213754^2 + 306459^2 .

It is a cyclic number.

It is not a de Polignac number, because 139607891197 - 2⁷ = 139607891069 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 (139607892197) 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, 1702535218 + ... + 1702535299.

It is an arithmetic number, because the mean of its divisors is an integer number (35753240439).

Almost surely, 2^139607891197 is an apocalyptic number.

It is an amenable number.

139607891197 is a deficient number, since it is larger than the sum of its proper divisors (3405070559).

139607891197 is an equidigital number, since it uses as much as digits as its factorization.

139607891197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405070558.

The product of its (nonzero) digits is 5143824, while the sum is 61.

The spelling of 139607891197 in words is "one hundred thirty-nine billion, six hundred seven million, eight hundred ninety-one thousand, one hundred ninety-seven".