129867671 has 2 divisors, whose sum is σ = 129867672. Its totient is φ = 129867670.

The previous prime is 129867659. The next prime is 129867677. The reversal of 129867671 is 176768921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129867671 is a prime.

It is a super-2 number, since 2×129867671² = 33731223941928482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129867677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64933835 + 64933836.

It is an arithmetic number, because the mean of its divisors is an integer number (64933836).

Almost surely, 2^129867671 is an apocalyptic number.

129867671 is a deficient number, since it is larger than the sum of its proper divisors (1).

129867671 is an equidigital number, since it uses as much as digits as its factorization.

129867671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 129867671 is about 11395.9497629640. The cubic root of 129867671 is about 506.4077584649.

The spelling of 129867671 in words is "one hundred twenty-nine million, eight hundred sixty-seven thousand, six hundred seventy-one".