77768623 has 2 divisors, whose sum is σ = 77768624. Its totient is φ = 77768622.

The previous prime is 77768617. The next prime is 77768657. The reversal of 77768623 is 32686777.

It is a weak prime.

It is an emirp because it is prime and its reverse (32686777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77768623 - 2¹⁷ = 77637551 is a prime.

It is a super-2 number, since 2×77768623² = 12095917446632258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77768423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38884311 + 38884312.

It is an arithmetic number, because the mean of its divisors is an integer number (38884312).

Almost surely, 2^77768623 is an apocalyptic number.

77768623 is a deficient number, since it is larger than the sum of its proper divisors (1).

77768623 is an equidigital number, since it uses as much as digits as its factorization.

77768623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 46.

The square root of 77768623 is about 8818.6519944944. The cubic root of 77768623 is about 426.8429732658.

The spelling of 77768623 in words is "seventy-seven million, seven hundred sixty-eight thousand, six hundred twenty-three".