7861613 has 2 divisors, whose sum is σ = 7861614. Its totient is φ = 7861612.

The previous prime is 7861591. The next prime is 7861657. The reversal of 7861613 is 3161687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5750404 + 2111209 = 2398^2 + 1453^2 .

7861613 is a truncatable prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7861613 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7861613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7861673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930806 + 3930807.

It is an arithmetic number, because the mean of its divisors is an integer number (3930807).

Almost surely, 2^7861613 is an apocalyptic number.

It is an amenable number.

7861613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7861613 is an equidigital number, since it uses as much as digits as its factorization.

7861613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 7861613 is about 2803.8568080414. The cubic root of 7861613 is about 198.8400607096.

The spelling of 7861613 in words is "seven million, eight hundred sixty-one thousand, six hundred thirteen".