3645868469 has 2 divisors, whose sum is σ = 3645868470. Its totient is φ = 3645868468.

The previous prime is 3645868427. The next prime is 3645868489. The reversal of 3645868469 is 9648685463.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1926771025 + 1719097444 = 43895^2 + 41462^2 .

It is an emirp because it is prime and its reverse (9648685463) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3645868469 is a prime.

It is a super-2 number, since 2×3645868469² = 26584713786496807922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3645868489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822934234 + 1822934235.

It is an arithmetic number, because the mean of its divisors is an integer number (1822934235).

Almost surely, 2^3645868469 is an apocalyptic number.

It is an amenable number.

3645868469 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645868469 is an equidigital number, since it uses as much as digits as its factorization.

3645868469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29859840, while the sum is 59.

The square root of 3645868469 is about 60381.0273927167. The cubic root of 3645868469 is about 1539.1005695540.

The spelling of 3645868469 in words is "three billion, six hundred forty-five million, eight hundred sixty-eight thousand, four hundred sixty-nine".