77243 has 2 divisors, whose sum is σ = 77244. Its totient is φ = 77242.

The previous prime is 77239. The next prime is 77249. The reversal of 77243 is 34277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77243 - 2² = 77239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38621 + 38622.

It is an arithmetic number, because the mean of its divisors is an integer number (38622).

2⁷⁷²⁴³ is an apocalyptic number.

77243 is a deficient number, since it is larger than the sum of its proper divisors (1).

77243 is an equidigital number, since it uses as much as digits as its factorization.

77243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 23.

The square root of 77243 is about 277.9262492101. The cubic root of 77243 is about 42.5879149009.

Subtracting from 77243 its product of digits (1176), we obtain a palindrome (76067).

The spelling of 77243 in words is "seventy-seven thousand, two hundred forty-three", and thus it is an iban number.