129951897 has 8 divisors (see below), whose sum is σ = 173753280. Its totient is φ = 86392560.

The previous prime is 129951889. The next prime is 129951911. The reversal of 129951897 is 798159921.

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

It is not a de Polignac number, because 129951897 - 2³ = 129951889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129953897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59254 + ... + 61407.

It is an arithmetic number, because the mean of its divisors is an integer number (21719160).

Almost surely, 2^129951897 is an apocalyptic number.

It is an amenable number.

129951897 is a deficient number, since it is larger than the sum of its proper divisors (43801383).

129951897 is a wasteful number, since it uses less digits than its factorization.

129951897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121023.

The product of its digits is 408240, while the sum is 51.

The square root of 129951897 is about 11399.6445997233. The cubic root of 129951897 is about 506.5172121419.

The spelling of 129951897 in words is "one hundred twenty-nine million, nine hundred fifty-one thousand, eight hundred ninety-seven".