775740013 has 2 divisors, whose sum is σ = 775740014. Its totient is φ = 775740012.

The previous prime is 775739981. The next prime is 775740089. The reversal of 775740013 is 310047577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527299369 + 248440644 = 22963^2 + 15762^2 .

It is a cyclic number.

It is not a de Polignac number, because 775740013 - 2⁵ = 775739981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775741013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387870006 + 387870007.

It is an arithmetic number, because the mean of its divisors is an integer number (387870007).

Almost surely, 2^775740013 is an apocalyptic number.

It is an amenable number.

775740013 is a deficient number, since it is larger than the sum of its proper divisors (1).

775740013 is an equidigital number, since it uses as much as digits as its factorization.

775740013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 775740013 is about 27852.1096687486. The cubic root of 775740013 is about 918.8375413338.

The spelling of 775740013 in words is "seven hundred seventy-five million, seven hundred forty thousand, thirteen".