129894645 has 8 divisors (see below), whose sum is σ = 207831456. Its totient is φ = 69277136.

The previous prime is 129894643. The next prime is 129894689. The reversal of 129894645 is 546498921.

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 129894645 - 2¹ = 129894643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129894594 and 129894603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129894643) 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, 4329807 + ... + 4329836.

It is an arithmetic number, because the mean of its divisors is an integer number (25978932).

Almost surely, 2^129894645 is an apocalyptic number.

129894645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129894645 is a deficient number, since it is larger than the sum of its proper divisors (77936811).

129894645 is an equidigital number, since it uses as much as digits as its factorization.

129894645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8659651.

The product of its digits is 622080, while the sum is 48.

The square root of 129894645 is about 11397.1331921672. The cubic root of 129894645 is about 506.4428169649.

The spelling of 129894645 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, six hundred forty-five".