2573934821 has 2 divisors, whose sum is σ = 2573934822. Its totient is φ = 2573934820.

The previous prime is 2573934809. The next prime is 2573934871. The reversal of 2573934821 is 1284393752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2570997025 + 2937796 = 50705^2 + 1714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2573934821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2573934871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286967410 + 1286967411.

It is an arithmetic number, because the mean of its divisors is an integer number (1286967411).

Almost surely, 2^2573934821 is an apocalyptic number.

It is an amenable number.

2573934821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2573934821 is an equidigital number, since it uses as much as digits as its factorization.

2573934821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 2573934821 is about 50733.9612192858. The cubic root of 2573934821 is about 1370.4583723820.

The spelling of 2573934821 in words is "two billion, five hundred seventy-three million, nine hundred thirty-four thousand, eight hundred twenty-one".