5671023821 has 2 divisors, whose sum is σ = 5671023822. Its totient is φ = 5671023820.

The previous prime is 5671023679. The next prime is 5671023857. The reversal of 5671023821 is 1283201765.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4434094921 + 1236928900 = 66589^2 + 35170^2 .

It is a cyclic number.

It is not a de Polignac number, because 5671023821 - 2¹⁴ = 5671007437 is a prime.

It is a super-2 number, since 2×5671023821² = 64321022356698880082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5671028821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2835511910 + 2835511911.

It is an arithmetic number, because the mean of its divisors is an integer number (2835511911).

Almost surely, 2^5671023821 is an apocalyptic number.

It is an amenable number.

5671023821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5671023821 is an equidigital number, since it uses as much as digits as its factorization.

5671023821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 5671023821 is about 75306.2004153708. The cubic root of 5671023821 is about 1783.2839076256.

The spelling of 5671023821 in words is "five billion, six hundred seventy-one million, twenty-three thousand, eight hundred twenty-one".