129758770 has 8 divisors (see below), whose sum is σ = 233565804. Its totient is φ = 51903504.

The previous prime is 129758767. The next prime is 129758779. The reversal of 129758770 is 77857921.

It can be written as a sum of positive squares in 2 ways, for example, as 122124601 + 7634169 = 11051^2 + 2763^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 129758770.

It is not an unprimeable number, because it can be changed into a prime (129758779) 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, 6487929 + ... + 6487948.

Almost surely, 2^129758770 is an apocalyptic number.

129758770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129758770 is a deficient number, since it is larger than the sum of its proper divisors (103807034).

129758770 is a wasteful number, since it uses less digits than its factorization.

129758770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12975884.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 129758770 is about 11391.1707036634. The cubic root of 129758770 is about 506.2661688683.

The spelling of 129758770 in words is "one hundred twenty-nine million, seven hundred fifty-eight thousand, seven hundred seventy".