4005220397 has 2 divisors, whose sum is σ = 4005220398. Its totient is φ = 4005220396.

The previous prime is 4005220343. The next prime is 4005220507. The reversal of 4005220397 is 7930225004.

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., 2353123081 + 1652097316 = 48509^2 + 40646^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005220397 - 2⁶ = 4005220333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4005210397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002610198 + 2002610199.

It is an arithmetic number, because the mean of its divisors is an integer number (2002610199).

Almost surely, 2^4005220397 is an apocalyptic number.

It is an amenable number.

4005220397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005220397 is an equidigital number, since it uses as much as digits as its factorization.

4005220397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 4005220397 is about 63286.8106085304. The cubic root of 4005220397 is about 1588.0913237383.

The spelling of 4005220397 in words is "four billion, five million, two hundred twenty thousand, three hundred ninety-seven".