139721035939 has 8 divisors (see below), whose sum is σ = 148040517888. Its totient is φ = 131412731520.

The previous prime is 139721035913. The next prime is 139721036023. The reversal of 139721035939 is 939530127931.

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 139721035939 - 2²⁹ = 139184165027 is a prime.

It is a super-2 number, since 2×139721035939² (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 (139721035039) 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, 2768632 + ... + 2818645.

It is an arithmetic number, because the mean of its divisors is an integer number (18505064736).

Almost surely, 2^139721035939 is an apocalyptic number.

139721035939 is a deficient number, since it is larger than the sum of its proper divisors (8319481949).

139721035939 is a wasteful number, since it uses less digits than its factorization.

139721035939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588765.

The product of its (nonzero) digits is 1377810, while the sum is 52.

The spelling of 139721035939 in words is "one hundred thirty-nine billion, seven hundred twenty-one million, thirty-five thousand, nine hundred thirty-nine".