256789373 has 2 divisors, whose sum is σ = 256789374. Its totient is φ = 256789372.

The previous prime is 256789349. The next prime is 256789381. The reversal of 256789373 is 373987652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206123449 + 50665924 = 14357^2 + 7118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256789373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256789333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128394686 + 128394687.

It is an arithmetic number, because the mean of its divisors is an integer number (128394687).

Almost surely, 2^256789373 is an apocalyptic number.

It is an amenable number.

256789373 is a deficient number, since it is larger than the sum of its proper divisors (1).

256789373 is an equidigital number, since it uses as much as digits as its factorization.

256789373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 256789373 is about 16024.6489197112. The cubic root of 256789373 is about 635.6123821462.

The spelling of 256789373 in words is "two hundred fifty-six million, seven hundred eighty-nine thousand, three hundred seventy-three".