139271897587 has 4 divisors (see below), whose sum is σ = 146601997480. Its totient is φ = 131941797696.

The previous prime is 139271897581. The next prime is 139271897603. The reversal of 139271897587 is 785798172931.

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 139271897587 - 2²⁷ = 139137679859 is a prime.

It is a super-2 number, since 2×139271897587² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139271897581) 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, 3665049918 + ... + 3665049955.

It is an arithmetic number, because the mean of its divisors is an integer number (36650499370).

Almost surely, 2^139271897587 is an apocalyptic number.

139271897587 is a deficient number, since it is larger than the sum of its proper divisors (7330099893).

139271897587 is an equidigital number, since it uses as much as digits as its factorization.

139271897587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7330099892.

The product of its digits is 53343360, while the sum is 67.

The spelling of 139271897587 in words is "one hundred thirty-nine billion, two hundred seventy-one million, eight hundred ninety-seven thousand, five hundred eighty-seven".