2147921349829 has 4 divisors (see below), whose sum is σ = 2148502343884. Its totient is φ = 2147340355776.

The previous prime is 2147921349811. The next prime is 2147921349859. The reversal of 2147921349829 is 9289431297412.

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 954196848900 + 1193724500929 = 976830^2 + 1092577^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147921349829 - 2⁹ = 2147921349317 is a prime.

It is a super-2 number, since 2×2147921349829² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147921349859) 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, 290491482 + ... + 290498875.

It is an arithmetic number, because the mean of its divisors is an integer number (537125585971).

Almost surely, 2^{2147921349829} is an apocalyptic number.

It is an amenable number.

2147921349829 is a deficient number, since it is larger than the sum of its proper divisors (580994055).

2147921349829 is an equidigital number, since it uses as much as digits as its factorization.

2147921349829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580994054.

The product of its digits is 15676416, while the sum is 61.

The spelling of 2147921349829 in words is "two trillion, one hundred forty-seven billion, nine hundred twenty-one million, three hundred forty-nine thousand, eight hundred twenty-nine".