129031867 has 2 divisors, whose sum is σ = 129031868. Its totient is φ = 129031866.

The previous prime is 129031849. The next prime is 129031871. The reversal of 129031867 is 768130921.

It is a strong prime.

It is an emirp because it is prime and its reverse (768130921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129031867 - 2⁷ = 129031739 is a prime.

It is not a weakly prime, because it can be changed into another prime (129031367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64515933 + 64515934.

It is an arithmetic number, because the mean of its divisors is an integer number (64515934).

Almost surely, 2^129031867 is an apocalyptic number.

129031867 is a deficient number, since it is larger than the sum of its proper divisors (1).

129031867 is an equidigital number, since it uses as much as digits as its factorization.

129031867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 129031867 is about 11359.2194714250. The cubic root of 129031867 is about 505.3190376933.

The spelling of 129031867 in words is "one hundred twenty-nine million, thirty-one thousand, eight hundred sixty-seven".