2145896729 has 8 divisors (see below), whose sum is σ = 2182992000. Its totient is φ = 2108825712.

The previous prime is 2145896717. The next prime is 2145896743. The reversal of 2145896729 is 9276985412.

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 2145896729 - 2⁴ = 2145896713 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145896429) 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, 341387 + ... + 347615.

It is an arithmetic number, because the mean of its divisors is an integer number (272874000).

Almost surely, 2^2145896729 is an apocalyptic number.

It is an amenable number.

2145896729 is a deficient number, since it is larger than the sum of its proper divisors (37095271).

2145896729 is an equidigital number, since it uses as much as digits as its factorization.

2145896729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12127.

The product of its digits is 2177280, while the sum is 53.

The square root of 2145896729 is about 46323.8246370051. The cubic root of 2145896729 is about 1289.8412818767.

The spelling of 2145896729 in words is "two billion, one hundred forty-five million, eight hundred ninety-six thousand, seven hundred twenty-nine".