2829371821 has 2 divisors, whose sum is σ = 2829371822. Its totient is φ = 2829371820.

The previous prime is 2829371791. The next prime is 2829371837. The reversal of 2829371821 is 1281739282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2807516196 + 21855625 = 52986^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2829371821 - 2²¹ = 2827274669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2829371021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1414685910 + 1414685911.

It is an arithmetic number, because the mean of its divisors is an integer number (1414685911).

Almost surely, 2^2829371821 is an apocalyptic number.

It is an amenable number.

2829371821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2829371821 is an equidigital number, since it uses as much as digits as its factorization.

2829371821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 2829371821 is about 53191.8397970967. The cubic root of 2829371821 is about 1414.3709942226.

The spelling of 2829371821 in words is "two billion, eight hundred twenty-nine million, three hundred seventy-one thousand, eight hundred twenty-one".