129767930 has 8 divisors (see below), whose sum is σ = 233582292. Its totient is φ = 51907168.

The previous prime is 129767881. The next prime is 129767933. The reversal of 129767930 is 39767921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123054649 + 6713281 = 11093^2 + 2591^2 .

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

It is not an unprimeable number, because it can be changed into a prime (129767933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6488387 + ... + 6488406.

Almost surely, 2^129767930 is an apocalyptic number.

129767930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129767930 is a deficient number, since it is larger than the sum of its proper divisors (103814362).

129767930 is a wasteful number, since it uses less digits than its factorization.

129767930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12976800.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 129767930 is about 11391.5727623538. The cubic root of 129767930 is about 506.2780814581.

Subtracting from 129767930 its reverse (39767921), we obtain a palindrome (90000009).

The spelling of 129767930 in words is "one hundred twenty-nine million, seven hundred sixty-seven thousand, nine hundred thirty".