102039870029 has 4 divisors (see below), whose sum is σ = 102081134076. Its totient is φ = 101998605984.

The previous prime is 102039870007. The next prime is 102039870059. The reversal of 102039870029 is 920078930201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920078930201 = 59 ⋅15594558139.

It can be written as a sum of positive squares in 2 ways, for example, as 39234497929 + 62805372100 = 198077^2 + 250610^2 .

It is a cyclic number.

It is not a de Polignac number, because 102039870029 - 2³² = 97744902733 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 (102039870059) 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, 20628314 + ... + 20633259.

It is an arithmetic number, because the mean of its divisors is an integer number (25520283519).

Almost surely, 2^102039870029 is an apocalyptic number.

It is an amenable number.

102039870029 is a deficient number, since it is larger than the sum of its proper divisors (41264047).

102039870029 is an equidigital number, since it uses as much as digits as its factorization.

102039870029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41264046.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 102039870029 in words is "one hundred two billion, thirty-nine million, eight hundred seventy thousand, twenty-nine".