129870787 has 8 divisors (see below), whose sum is σ = 135541440. Its totient is φ = 124279680.

The previous prime is 129870781. The next prime is 129870799. The reversal of 129870787 is 787078921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129870787 is a prime.

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

It is a pancake number, because a pancake can be divided into 129870787 parts by 16116 straight cuts.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129870787.

It is not an unprimeable number, because it can be changed into a prime (129870781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16539 + ... + 23092.

It is an arithmetic number, because the mean of its divisors is an integer number (16942680).

Almost surely, 2^129870787 is an apocalyptic number.

129870787 is a deficient number, since it is larger than the sum of its proper divisors (5670653).

129870787 is a wasteful number, since it uses less digits than its factorization.

129870787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39773.

The product of its (nonzero) digits is 395136, while the sum is 49.

The square root of 129870787 is about 11396.0864773834. The cubic root of 129870787 is about 506.4118086234.

The spelling of 129870787 in words is "one hundred twenty-nine million, eight hundred seventy thousand, seven hundred eighty-seven".