4020799997 has 2 divisors, whose sum is σ = 4020799998. Its totient is φ = 4020799996.

The previous prime is 4020799973. The next prime is 4020800023. The reversal of 4020799997 is 7999970204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3143396356 + 877403641 = 56066^2 + 29621^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020799997 - 2¹⁰ = 4020798973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020799907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010399998 + 2010399999.

It is an arithmetic number, because the mean of its divisors is an integer number (2010399999).

Almost surely, 2^4020799997 is an apocalyptic number.

It is an amenable number.

4020799997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020799997 is an equidigital number, since it uses as much as digits as its factorization.

4020799997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The square root of 4020799997 is about 63409.7784020730. The cubic root of 4020799997 is about 1590.1477912015.

The spelling of 4020799997 in words is "four billion, twenty million, seven hundred ninety-nine thousand, nine hundred ninety-seven".