776625131 has 2 divisors, whose sum is σ = 776625132. Its totient is φ = 776625130.

The previous prime is 776625119. The next prime is 776625139. The reversal of 776625131 is 131526677.

It is a strong prime.

It is an emirp because it is prime and its reverse (131526677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776625131 - 2¹⁴ = 776608747 is a prime.

It is a super-2 number, since 2×776625131² = 1206293188201534322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (776625139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388312565 + 388312566.

It is an arithmetic number, because the mean of its divisors is an integer number (388312566).

Almost surely, 2^776625131 is an apocalyptic number.

776625131 is a deficient number, since it is larger than the sum of its proper divisors (1).

776625131 is an equidigital number, since it uses as much as digits as its factorization.

776625131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 776625131 is about 27867.9947430740. The cubic root of 776625131 is about 919.1868725154.

The spelling of 776625131 in words is "seven hundred seventy-six million, six hundred twenty-five thousand, one hundred thirty-one".