256773469 has 2 divisors, whose sum is σ = 256773470. Its totient is φ = 256773468.

The previous prime is 256773437. The next prime is 256773563. The reversal of 256773469 is 964377652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201270969 + 55502500 = 14187^2 + 7450^2 .

It is a cyclic number.

It is not a de Polignac number, because 256773469 - 2⁵ = 256773437 is a prime.

It is a super-2 number, since 2×256773469² = 131865228764587922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256773409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128386734 + 128386735.

It is an arithmetic number, because the mean of its divisors is an integer number (128386735).

Almost surely, 2^256773469 is an apocalyptic number.

It is an amenable number.

256773469 is a deficient number, since it is larger than the sum of its proper divisors (1).

256773469 is an equidigital number, since it uses as much as digits as its factorization.

256773469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 49.

The square root of 256773469 is about 16024.1526765068. The cubic root of 256773469 is about 635.5992598638.

The spelling of 256773469 in words is "two hundred fifty-six million, seven hundred seventy-three thousand, four hundred sixty-nine".