77317243 has 2 divisors, whose sum is σ = 77317244. Its totient is φ = 77317242.

The previous prime is 77317189. The next prime is 77317249. The reversal of 77317243 is 34271377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77317243 - 2¹³ = 77309051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77317199 and 77317208.

It is not a weakly prime, because it can be changed into another prime (77317249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38658621 + 38658622.

It is an arithmetic number, because the mean of its divisors is an integer number (38658622).

Almost surely, 2^77317243 is an apocalyptic number.

77317243 is a deficient number, since it is larger than the sum of its proper divisors (1).

77317243 is an equidigital number, since it uses as much as digits as its factorization.

77317243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 34.

The square root of 77317243 is about 8793.0224041566. The cubic root of 77317243 is about 426.0155515347.

The spelling of 77317243 in words is "seventy-seven million, three hundred seventeen thousand, two hundred forty-three".