129070987 has 8 divisors (see below), whose sum is σ = 136782000. Its totient is φ = 121373184.

The previous prime is 129070979. The next prime is 129070999. The reversal of 129070987 is 789070921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 129070987 - 2³ = 129070979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (129070957) 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, 22764 + ... + 27862.

It is an arithmetic number, because the mean of its divisors is an integer number (17097750).

Almost surely, 2^129070987 is an apocalyptic number.

129070987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129070987 is a deficient number, since it is larger than the sum of its proper divisors (7711013).

129070987 is a wasteful number, since it uses less digits than its factorization.

129070987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6605.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 129070987 is about 11360.9412902277. The cubic root of 129070987 is about 505.3701002299.

The spelling of 129070987 in words is "one hundred twenty-nine million, seventy thousand, nine hundred eighty-seven".