129697867 has 6 divisors (see below), whose sum is σ = 140442252. Its totient is φ = 119720952.

The previous prime is 129697853. The next prime is 129697907. The reversal of 129697867 is 768796921.

It is not a de Polignac number, because 129697867 - 2⁷ = 129697739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129697807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 383553 + ... + 383890.

It is an arithmetic number, because the mean of its divisors is an integer number (23407042).

Almost surely, 2^129697867 is an apocalyptic number.

129697867 is a deficient number, since it is larger than the sum of its proper divisors (10744385).

129697867 is an equidigital number, since it uses as much as digits as its factorization.

129697867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767469 (or 767456 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The square root of 129697867 is about 11388.4971352677. The cubic root of 129697867 is about 506.1869501929.

The spelling of 129697867 in words is "one hundred twenty-nine million, six hundred ninety-seven thousand, eight hundred sixty-seven".