129849887 has 2 divisors, whose sum is σ = 129849888. Its totient is φ = 129849886.

The previous prime is 129849823. The next prime is 129849899. The reversal of 129849887 is 788948921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129849887 - 2⁶ = 129849823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129846887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64924943 + 64924944.

It is an arithmetic number, because the mean of its divisors is an integer number (64924944).

Almost surely, 2^129849887 is an apocalyptic number.

129849887 is a deficient number, since it is larger than the sum of its proper divisors (1).

129849887 is an equidigital number, since it uses as much as digits as its factorization.

129849887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 56.

The square root of 129849887 is about 11395.1694590296. The cubic root of 129849887 is about 506.3846416860.

The spelling of 129849887 in words is "one hundred twenty-nine million, eight hundred forty-nine thousand, eight hundred eighty-seven".