139737520447 has 4 divisors (see below), whose sum is σ = 159700023376. Its totient is φ = 119775017520.

The previous prime is 139737520387. The next prime is 139737520459. The reversal of 139737520447 is 744025737931.

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 139737520447 - 2²⁷ = 139603302719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139737520394 and 139737520403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139737523447) 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, 9981251454 + ... + 9981251467.

It is an arithmetic number, because the mean of its divisors is an integer number (39925005844).

Almost surely, 2^139737520447 is an apocalyptic number.

139737520447 is a deficient number, since it is larger than the sum of its proper divisors (19962502929).

139737520447 is an equidigital number, since it uses as much as digits as its factorization.

139737520447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19962502928.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 139737520447 in words is "one hundred thirty-nine billion, seven hundred thirty-seven million, five hundred twenty thousand, four hundred forty-seven".