3520399 has 2 divisors, whose sum is σ = 3520400. Its totient is φ = 3520398.

The previous prime is 3520351. The next prime is 3520427. The reversal of 3520399 is 9930253.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3520399 is a prime.

3520399 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3520399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3520499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760199 + 1760200.

It is an arithmetic number, because the mean of its divisors is an integer number (1760200).

Almost surely, 2^3520399 is an apocalyptic number.

3520399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3520399 is an equidigital number, since it uses as much as digits as its factorization.

3520399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 3520399 is about 1876.2726347735. The cubic root of 3520399 is about 152.1238458574.

The spelling of 3520399 in words is "three million, five hundred twenty thousand, three hundred ninety-nine".