77868293 has 2 divisors, whose sum is σ = 77868294. Its totient is φ = 77868292.

The previous prime is 77868281. The next prime is 77868341. The reversal of 77868293 is 39286877.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77123524 + 744769 = 8782^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 77868293 - 2⁶ = 77868229 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77868233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38934146 + 38934147.

It is an arithmetic number, because the mean of its divisors is an integer number (38934147).

Almost surely, 2^77868293 is an apocalyptic number.

It is an amenable number.

77868293 is a deficient number, since it is larger than the sum of its proper divisors (1).

77868293 is an equidigital number, since it uses as much as digits as its factorization.

77868293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 77868293 is about 8824.3012754552. The cubic root of 77868293 is about 427.0252459081.

The spelling of 77868293 in words is "seventy-seven million, eight hundred sixty-eight thousand, two hundred ninety-three".