256946953 has 2 divisors, whose sum is σ = 256946954. Its totient is φ = 256946952.

The previous prime is 256946939. The next prime is 256946969. The reversal of 256946953 is 359649652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166848889 + 90098064 = 12917^2 + 9492^2 .

It is a cyclic number.

It is not a de Polignac number, because 256946953 - 2²¹ = 254849801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256946897 and 256946906.

It is not a weakly prime, because it can be changed into another prime (256946153) 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, 128473476 + 128473477.

It is an arithmetic number, because the mean of its divisors is an integer number (128473477).

Almost surely, 2^256946953 is an apocalyptic number.

It is an amenable number.

256946953 is a deficient number, since it is larger than the sum of its proper divisors (1).

256946953 is an equidigital number, since it uses as much as digits as its factorization.

256946953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 49.

The square root of 256946953 is about 16029.5649660245. The cubic root of 256946953 is about 635.7423710643.

The spelling of 256946953 in words is "two hundred fifty-six million, nine hundred forty-six thousand, nine hundred fifty-three".