256793197 has 8 divisors (see below), whose sum is σ = 259338240. Its totient is φ = 254261040.

The previous prime is 256793191. The next prime is 256793219. The reversal of 256793197 is 791397652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256793197 - 2¹¹ = 256791149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256793197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256793191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39579 + ... + 45607.

It is an arithmetic number, because the mean of its divisors is an integer number (32417280).

Almost surely, 2^256793197 is an apocalyptic number.

It is an amenable number.

256793197 is a deficient number, since it is larger than the sum of its proper divisors (2545043).

256793197 is a wasteful number, since it uses less digits than its factorization.

256793197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443.

The product of its digits is 714420, while the sum is 49.

The square root of 256793197 is about 16024.7682354535. The cubic root of 256793197 is about 635.6155372218.

The spelling of 256793197 in words is "two hundred fifty-six million, seven hundred ninety-three thousand, one hundred ninety-seven".