68780129 has 16 divisors (see below), whose sum is σ = 77172480. Its totient is φ = 60764160.

The previous prime is 68780111. The next prime is 68780183. The reversal of 68780129 is 92108786.

It is a cyclic number.

It is not a de Polignac number, because 68780129 - 2²⁴ = 52002913 is a prime.

It is a super-2 number, since 2×68780129² = 9461412290513282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68780729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89057 + ... + 89825.

It is an arithmetic number, because the mean of its divisors is an integer number (4823280).

Almost surely, 2^68780129 is an apocalyptic number.

It is an amenable number.

68780129 is a deficient number, since it is larger than the sum of its proper divisors (8392351).

68780129 is a wasteful number, since it uses less digits than its factorization.

68780129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 68780129 is about 8293.3786239385. The cubic root of 68780129 is about 409.7204697862.

The spelling of 68780129 in words is "sixty-eight million, seven hundred eighty thousand, one hundred twenty-nine".