780129113 has 4 divisors (see below), whose sum is σ = 821188560. Its totient is φ = 739069668.

The previous prime is 780129109. The next prime is 780129137. The reversal of 780129113 is 311921087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311921087 = 131 ⋅2381077.

It is a cyclic number.

It is not a de Polignac number, because 780129113 - 2² = 780129109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780129113.

It is not an unprimeable number, because it can be changed into a prime (780129613) 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, 20529695 + ... + 20529732.

It is an arithmetic number, because the mean of its divisors is an integer number (205297140).

Almost surely, 2^780129113 is an apocalyptic number.

It is an amenable number.

780129113 is a deficient number, since it is larger than the sum of its proper divisors (41059447).

780129113 is a wasteful number, since it uses less digits than its factorization.

780129113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41059446.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 780129113 is about 27930.7914853840. The cubic root of 780129113 is about 920.5671963191.

The spelling of 780129113 in words is "seven hundred eighty million, one hundred twenty-nine thousand, one hundred thirteen".