1604513069 has 2 divisors, whose sum is σ = 1604513070. Its totient is φ = 1604513068.

The previous prime is 1604513059. The next prime is 1604513077. The reversal of 1604513069 is 9603154061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1310802025 + 293711044 = 36205^2 + 17138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604513069 is a prime.

It is a super-2 number, since 2×1604513069² = 5148924377183597522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604513039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802256534 + 802256535.

It is an arithmetic number, because the mean of its divisors is an integer number (802256535).

Almost surely, 2^1604513069 is an apocalyptic number.

It is an amenable number.

1604513069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604513069 is an equidigital number, since it uses as much as digits as its factorization.

1604513069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1604513069 is about 40056.3736376622. The cubic root of 1604513069 is about 1170.7057540986.

The spelling of 1604513069 in words is "one billion, six hundred four million, five hundred thirteen thousand, sixty-nine".