77348213 has 2 divisors, whose sum is σ = 77348214. Its totient is φ = 77348212.

The previous prime is 77348179. The next prime is 77348239. The reversal of 77348213 is 31284377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 10876804 = 8153^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 77348213 - 2⁸ = 77347957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77348273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38674106 + 38674107.

It is an arithmetic number, because the mean of its divisors is an integer number (38674107).

Almost surely, 2^77348213 is an apocalyptic number.

It is an amenable number.

77348213 is a deficient number, since it is larger than the sum of its proper divisors (1).

77348213 is an equidigital number, since it uses as much as digits as its factorization.

77348213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 77348213 is about 8794.7832832879. The cubic root of 77348213 is about 426.0724251802.

The spelling of 77348213 in words is "seventy-seven million, three hundred forty-eight thousand, two hundred thirteen".