129725213 has 2 divisors, whose sum is σ = 129725214. Its totient is φ = 129725212.

The previous prime is 129725203. The next prime is 129725227. The reversal of 129725213 is 312527921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75290329 + 54434884 = 8677^2 + 7378^2 .

It is an emirp because it is prime and its reverse (312527921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129725213 - 2¹⁴ = 129708829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129725213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129725203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64862606 + 64862607.

It is an arithmetic number, because the mean of its divisors is an integer number (64862607).

Almost surely, 2^129725213 is an apocalyptic number.

It is an amenable number.

129725213 is a deficient number, since it is larger than the sum of its proper divisors (1).

129725213 is an equidigital number, since it uses as much as digits as its factorization.

129725213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 129725213 is about 11389.6976693853. The cubic root of 129725213 is about 506.2225231645. Note that the first 3 decimals are identical.

The spelling of 129725213 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, two hundred thirteen".