8374023821 has 2 divisors, whose sum is σ = 8374023822. Its totient is φ = 8374023820.

The previous prime is 8374023739. The next prime is 8374023857. The reversal of 8374023821 is 1283204738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7077015625 + 1297008196 = 84125^2 + 36014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8374023821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8374022821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4187011910 + 4187011911.

It is an arithmetic number, because the mean of its divisors is an integer number (4187011911).

Almost surely, 2^8374023821 is an apocalyptic number.

It is an amenable number.

8374023821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8374023821 is an equidigital number, since it uses as much as digits as its factorization.

8374023821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 8374023821 is about 91509.6924975710. The cubic root of 8374023821 is about 2030.6951457051.

The spelling of 8374023821 in words is "eight billion, three hundred seventy-four million, twenty-three thousand, eight hundred twenty-one".