129697870 has 8 divisors (see below), whose sum is σ = 233456184. Its totient is φ = 51879144.

The previous prime is 129697853. The next prime is 129697907. The reversal of 129697870 is 78796921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6484884 + ... + 6484903.

It is an arithmetic number, because the mean of its divisors is an integer number (29182023).

Almost surely, 2^129697870 is an apocalyptic number.

129697870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129697870 is a deficient number, since it is larger than the sum of its proper divisors (103758314).

129697870 is a wasteful number, since it uses less digits than its factorization.

129697870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12969794.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 129697870 is about 11388.4972669795. The cubic root of 129697870 is about 506.1869540958.

The spelling of 129697870 in words is "one hundred twenty-nine million, six hundred ninety-seven thousand, eight hundred seventy".