3202720397 has 2 divisors, whose sum is σ = 3202720398. Its totient is φ = 3202720396.

The previous prime is 3202720387. The next prime is 3202720429. The reversal of 3202720397 is 7930272023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3183893476 + 18826921 = 56426^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 3202720397 - 2³⁰ = 2128978573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3202720337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601360198 + 1601360199.

It is an arithmetic number, because the mean of its divisors is an integer number (1601360199).

Almost surely, 2^3202720397 is an apocalyptic number.

It is an amenable number.

3202720397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3202720397 is an equidigital number, since it uses as much as digits as its factorization.

3202720397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 3202720397 is about 56592.5825263347. The cubic root of 3202720397 is about 1474.0300656890.

The spelling of 3202720397 in words is "three billion, two hundred two million, seven hundred twenty thousand, three hundred ninety-seven".