256943119 has 2 divisors, whose sum is σ = 256943120. Its totient is φ = 256943118.

The previous prime is 256943047. The next prime is 256943131. The reversal of 256943119 is 911349652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256943119 is a prime.

It is a super-2 number, since 2×256943119² = 132039532802896322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256943149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128471559 + 128471560.

It is an arithmetic number, because the mean of its divisors is an integer number (128471560).

Almost surely, 2^256943119 is an apocalyptic number.

256943119 is a deficient number, since it is larger than the sum of its proper divisors (1).

256943119 is an equidigital number, since it uses as much as digits as its factorization.

256943119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 256943119 is about 16029.4453740608. The cubic root of 256943119 is about 635.7392090000.

The spelling of 256943119 in words is "two hundred fifty-six million, nine hundred forty-three thousand, one hundred nineteen".