129259903 has 2 divisors, whose sum is σ = 129259904. Its totient is φ = 129259902.

The previous prime is 129259847. The next prime is 129259913. The reversal of 129259903 is 309952921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129259903 - 2¹³ = 129251711 is a prime.

It is a super-5 number, since 5×129259903⁵ (a number of 42 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129259913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64629951 + 64629952.

It is an arithmetic number, because the mean of its divisors is an integer number (64629952).

Almost surely, 2^129259903 is an apocalyptic number.

129259903 is a deficient number, since it is larger than the sum of its proper divisors (1).

129259903 is an equidigital number, since it uses as much as digits as its factorization.

129259903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 129259903 is about 11369.2525260019. The cubic root of 129259903 is about 505.6165433131.

The spelling of 129259903 in words is "one hundred twenty-nine million, two hundred fifty-nine thousand, nine hundred three".