775073731 has 2 divisors, whose sum is σ = 775073732. Its totient is φ = 775073730.

The previous prime is 775073729. The next prime is 775073771. The reversal of 775073731 is 137370577.

It is an a-pointer prime, because the next prime (775073771) can be obtained adding 775073731 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 775073731 - 2¹ = 775073729 is a prime.

It is a super-2 number, since 2×775073731² = 1201478576972520722, which contains 22 as substring.

Together with 775073729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (775073771) 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, 387536865 + 387536866.

It is an arithmetic number, because the mean of its divisors is an integer number (387536866).

Almost surely, 2^775073731 is an apocalyptic number.

775073731 is a deficient number, since it is larger than the sum of its proper divisors (1).

775073731 is an equidigital number, since it uses as much as digits as its factorization.

775073731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108045, while the sum is 40.

The square root of 775073731 is about 27840.1460305078. The cubic root of 775073731 is about 918.5744032282.

The spelling of 775073731 in words is "seven hundred seventy-five million, seventy-three thousand, seven hundred thirty-one".