2149946129 has 4 divisors (see below), whose sum is σ = 2150225076. Its totient is φ = 2149667184.

The previous prime is 2149946063. The next prime is 2149946173. The reversal of 2149946129 is 9216499412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 669774400 + 1480171729 = 25880^2 + 38473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2149946129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149946179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127574 + ... + 143439.

It is an arithmetic number, because the mean of its divisors is an integer number (537556269).

Almost surely, 2^2149946129 is an apocalyptic number.

It is an amenable number.

2149946129 is a deficient number, since it is larger than the sum of its proper divisors (278947).

2149946129 is an equidigital number, since it uses as much as digits as its factorization.

2149946129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278946.

The product of its digits is 279936, while the sum is 47.

The square root of 2149946129 is about 46367.5115679071. The cubic root of 2149946129 is about 1290.6521008476.

The spelling of 2149946129 in words is "two billion, one hundred forty-nine million, nine hundred forty-six thousand, one hundred twenty-nine".