776396129 has 2 divisors, whose sum is σ = 776396130. Its totient is φ = 776396128.

The previous prime is 776396113. The next prime is 776396141. The reversal of 776396129 is 921693677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 754051600 + 22344529 = 27460^2 + 4727^2 .

It is a cyclic number.

It is not a de Polignac number, because 776396129 - 2⁴ = 776396113 is a prime.

It is not a weakly prime, because it can be changed into another prime (776396189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388198064 + 388198065.

It is an arithmetic number, because the mean of its divisors is an integer number (388198065).

Almost surely, 2^776396129 is an apocalyptic number.

It is an amenable number.

776396129 is a deficient number, since it is larger than the sum of its proper divisors (1).

776396129 is an equidigital number, since it uses as much as digits as its factorization.

776396129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 776396129 is about 27863.8857484020. The cubic root of 776396129 is about 919.0965173291.

The spelling of 776396129 in words is "seven hundred seventy-six million, three hundred ninety-six thousand, one hundred twenty-nine".