77268817 has 2 divisors, whose sum is σ = 77268818. Its totient is φ = 77268816.

The previous prime is 77268797. The next prime is 77268853. The reversal of 77268817 is 71886277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73547776 + 3721041 = 8576^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 77268817 - 2¹⁹ = 76744529 is a prime.

It is not a weakly prime, because it can be changed into another prime (77268857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38634408 + 38634409.

It is an arithmetic number, because the mean of its divisors is an integer number (38634409).

Almost surely, 2^77268817 is an apocalyptic number.

It is an amenable number.

77268817 is a deficient number, since it is larger than the sum of its proper divisors (1).

77268817 is an equidigital number, since it uses as much as digits as its factorization.

77268817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 263424, while the sum is 46.

The square root of 77268817 is about 8790.2683121734. The cubic root of 77268817 is about 425.9265910523.

The spelling of 77268817 in words is "seventy-seven million, two hundred sixty-eight thousand, eight hundred seventeen".