129002719138 has 8 divisors (see below), whose sum is σ = 193528932588. Its totient is φ = 64493074944.

The previous prime is 129002719099. The next prime is 129002719211. The reversal of 129002719138 is 831917200921.

It can be written as a sum of positive squares in 2 ways, for example, as 121812866289 + 7189852849 = 349017^2 + 84793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129002719138² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129002719094 and 129002719103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4122831 + ... + 4154002.

Almost surely, 2^129002719138 is an apocalyptic number.

129002719138 is a deficient number, since it is larger than the sum of its proper divisors (64526213450).

129002719138 is an equidigital number, since it uses as much as digits as its factorization.

129002719138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8284628.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 129002719138 in words is "one hundred twenty-nine billion, two million, seven hundred nineteen thousand, one hundred thirty-eight".