7663613 has 8 divisors (see below), whose sum is σ = 7900536. Its totient is φ = 7430400.

The previous prime is 7663567. The next prime is 7663633. The reversal of 7663613 is 3163667.

7663613 = 1957² + 1958².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 465124 + 7198489 = 682^2 + 2683^2 .

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 7663613 - 2¹² = 7659517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7663613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7663633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3593 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (987567).

Almost surely, 2^7663613 is an apocalyptic number.

7663613 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

7663613 is the 1958-th centered square number.

It is an amenable number.

7663613 is a deficient number, since it is larger than the sum of its proper divisors (236923).

7663613 is a wasteful number, since it uses less digits than its factorization.

7663613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its digits is 13608, while the sum is 32.

The square root of 7663613 is about 2768.3231386527. The cubic root of 7663613 is about 197.1565402681.

The spelling of 7663613 in words is "seven million, six hundred sixty-three thousand, six hundred thirteen".