7783213 has 2 divisors, whose sum is σ = 7783214. Its totient is φ = 7783212.

The previous prime is 7783211. The next prime is 7783231. The reversal of 7783213 is 3123877.

Together with next prime (7783231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4678569 + 3104644 = 2163^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 7783213 - 2¹ = 7783211 is a prime.

It is a super-3 number, since 3×7783213³ (a number of 22 digits) contains 333 as substring.

Together with 7783211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7783211) 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 as a sum of consecutive naturals, namely, 3891606 + 3891607.

It is an arithmetic number, because the mean of its divisors is an integer number (3891607).

Almost surely, 2^7783213 is an apocalyptic number.

It is an amenable number.

7783213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7783213 is an equidigital number, since it uses as much as digits as its factorization.

7783213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 7783213 is about 2789.8410348979. The cubic root of 7783213 is about 198.1768732076.

The spelling of 7783213 in words is "seven million, seven hundred eighty-three thousand, two hundred thirteen".