775706531 has 2 divisors, whose sum is σ = 775706532. Its totient is φ = 775706530.

The previous prime is 775706509. The next prime is 775706539. The reversal of 775706531 is 135607577.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 775706531 - 2²² = 771512227 is a prime.

It is a super-2 number, since 2×775706531² = 1203441244472107922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (775706539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387853265 + 387853266.

It is an arithmetic number, because the mean of its divisors is an integer number (387853266).

Almost surely, 2^775706531 is an apocalyptic number.

775706531 is a deficient number, since it is larger than the sum of its proper divisors (1).

775706531 is an equidigital number, since it uses as much as digits as its factorization.

775706531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154350, while the sum is 41.

The square root of 775706531 is about 27851.5085946884. The cubic root of 775706531 is about 918.8243217153.

The spelling of 775706531 in words is "seven hundred seventy-five million, seven hundred six thousand, five hundred thirty-one".