39139055293 has 4 divisors (see below), whose sum is σ = 42149751868. Its totient is φ = 36128358720.

The previous prime is 39139055287. The next prime is 39139055303. The reversal of 39139055293 is 39255093193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39255093193 = 17 ⋅2309123129.

It can be written as a sum of positive squares in 2 ways, for example, as 24497571289 + 14641484004 = 156517^2 + 121002^2 .

It is a cyclic number.

It is not a de Polignac number, because 39139055293 - 2⁵ = 39139055261 is a prime.

It is a super-2 number, since 2×39139055293² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39139055233) 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, 1505348268 + ... + 1505348293.

It is an arithmetic number, because the mean of its divisors is an integer number (10537437967).

Almost surely, 2^39139055293 is an apocalyptic number.

It is an amenable number.

39139055293 is a deficient number, since it is larger than the sum of its proper divisors (3010696575).

39139055293 is a wasteful number, since it uses less digits than its factorization.

39139055293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010696574.

The product of its (nonzero) digits is 984150, while the sum is 49.

The spelling of 39139055293 in words is "thirty-nine billion, one hundred thirty-nine million, fifty-five thousand, two hundred ninety-three".