129001930 has 16 divisors (see below), whose sum is σ = 234260424. Its totient is φ = 51143680.

The previous prime is 129001927. The next prime is 129001931. The reversal of 129001930 is 39100921.

It can be written as a sum of positive squares in 4 ways, for example, as 96294969 + 32706961 = 9813^2 + 5719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129001895 and 129001904.

It is not an unprimeable number, because it can be changed into a prime (129001931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55951 + ... + 58210.

Almost surely, 2^129001930 is an apocalyptic number.

129001930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129001930 is a deficient number, since it is larger than the sum of its proper divisors (105258494).

129001930 is a wasteful number, since it uses less digits than its factorization.

129001930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114281.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 129001930 is about 11357.9016547952. The cubic root of 129001930 is about 505.2799545673.

The spelling of 129001930 in words is "one hundred twenty-nine million, one thousand, nine hundred thirty".