8070821477 has 2 divisors, whose sum is σ = 8070821478. Its totient is φ = 8070821476.

The previous prime is 8070821453. The next prime is 8070821531. The reversal of 8070821477 is 7741280708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5138165761 + 2932655716 = 71681^2 + 54154^2 .

It is a cyclic number.

It is not a de Polignac number, because 8070821477 - 2¹⁸ = 8070559333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8070821377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4035410738 + 4035410739.

It is an arithmetic number, because the mean of its divisors is an integer number (4035410739).

Almost surely, 2^8070821477 is an apocalyptic number.

It is an amenable number.

8070821477 is a deficient number, since it is larger than the sum of its proper divisors (1).

8070821477 is an equidigital number, since it uses as much as digits as its factorization.

8070821477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175616, while the sum is 44.

The square root of 8070821477 is about 89837.7508456217. The cubic root of 8070821477 is about 2005.8844593391.

The spelling of 8070821477 in words is "eight billion, seventy million, eight hundred twenty-one thousand, four hundred seventy-seven".