129690293 has 2 divisors, whose sum is σ = 129690294. Its totient is φ = 129690292.

The previous prime is 129690283. The next prime is 129690299. The reversal of 129690293 is 392096921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78180964 + 51509329 = 8842^2 + 7177^2 .

It is an emirp because it is prime and its reverse (392096921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129690293 - 2⁸ = 129690037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129690293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129690299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64845146 + 64845147.

It is an arithmetic number, because the mean of its divisors is an integer number (64845147).

Almost surely, 2^129690293 is an apocalyptic number.

It is an amenable number.

129690293 is a deficient number, since it is larger than the sum of its proper divisors (1).

129690293 is an equidigital number, since it uses as much as digits as its factorization.

129690293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 129690293 is about 11388.1646019014. The cubic root of 129690293 is about 506.1770966909.

The spelling of 129690293 in words is "one hundred twenty-nine million, six hundred ninety thousand, two hundred ninety-three".