256170347 has 2 divisors, whose sum is σ = 256170348. Its totient is φ = 256170346.

The previous prime is 256170323. The next prime is 256170361. The reversal of 256170347 is 743071652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256170347 - 2⁶ = 256170283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256170367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128085173 + 128085174.

It is an arithmetic number, because the mean of its divisors is an integer number (128085174).

Almost surely, 2^256170347 is an apocalyptic number.

256170347 is a deficient number, since it is larger than the sum of its proper divisors (1).

256170347 is an equidigital number, since it uses as much as digits as its factorization.

256170347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 256170347 is about 16005.3224584824. The cubic root of 256170347 is about 635.1012275846.

The spelling of 256170347 in words is "two hundred fifty-six million, one hundred seventy thousand, three hundred forty-seven".