129342887 has 2 divisors, whose sum is σ = 129342888. Its totient is φ = 129342886.

The previous prime is 129342859. The next prime is 129342907. The reversal of 129342887 is 788243921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129342887 - 2¹⁴ = 129326503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129342827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64671443 + 64671444.

It is an arithmetic number, because the mean of its divisors is an integer number (64671444).

Almost surely, 2^129342887 is an apocalyptic number.

129342887 is a deficient number, since it is larger than the sum of its proper divisors (1).

129342887 is an equidigital number, since it uses as much as digits as its factorization.

129342887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 129342887 is about 11372.9014327919. The cubic root of 129342887 is about 505.7247209885.

The spelling of 129342887 in words is "one hundred twenty-nine million, three hundred forty-two thousand, eight hundred eighty-seven".