256167829 has 2 divisors, whose sum is σ = 256167830. Its totient is φ = 256167828.

The previous prime is 256167827. The next prime is 256167869. The reversal of 256167829 is 928761652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252873604 + 3294225 = 15902^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 256167829 - 2¹ = 256167827 is a prime.

It is a super-2 number, since 2×256167829² = 131243913229146482, which contains 22 as substring.

Together with 256167827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256167827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128083914 + 128083915.

It is an arithmetic number, because the mean of its divisors is an integer number (128083915).

Almost surely, 2^256167829 is an apocalyptic number.

It is an amenable number.

256167829 is a deficient number, since it is larger than the sum of its proper divisors (1).

256167829 is an equidigital number, since it uses as much as digits as its factorization.

256167829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 256167829 is about 16005.2437969560. The cubic root of 256167829 is about 635.0991466904.

The spelling of 256167829 in words is "two hundred fifty-six million, one hundred sixty-seven thousand, eight hundred twenty-nine".