7813645 has 8 divisors (see below), whose sum is σ = 10715904. Its totient is φ = 5357904.

The previous prime is 7813639. The next prime is 7813649. The reversal of 7813645 is 5463187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7813645 - 2⁵ = 7813613 is a prime.

It is a super-3 number, since 3×7813645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7813645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7813649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111589 + ... + 111658.

It is an arithmetic number, because the mean of its divisors is an integer number (1339488).

Almost surely, 2^7813645 is an apocalyptic number.

It is an amenable number.

7813645 is a deficient number, since it is larger than the sum of its proper divisors (2902259).

7813645 is a wasteful number, since it uses less digits than its factorization.

7813645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223259.

The product of its digits is 20160, while the sum is 34.

The square root of 7813645 is about 2795.2897881973. The cubic root of 7813645 is about 198.4348247516.

The spelling of 7813645 in words is "seven million, eight hundred thirteen thousand, six hundred forty-five".