255690623 has 2 divisors, whose sum is σ = 255690624. Its totient is φ = 255690622.

The previous prime is 255690587. The next prime is 255690661. The reversal of 255690623 is 326096552.

It is an a-pointer prime, because the next prime (255690661) can be obtained adding 255690623 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255690623 - 2¹⁶ = 255625087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255690823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127845311 + 127845312.

It is an arithmetic number, because the mean of its divisors is an integer number (127845312).

Almost surely, 2^255690623 is an apocalyptic number.

255690623 is a deficient number, since it is larger than the sum of its proper divisors (1).

255690623 is an equidigital number, since it uses as much as digits as its factorization.

255690623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 255690623 is about 15990.3290460203. The cubic root of 255690623 is about 634.7045336298.

The spelling of 255690623 in words is "two hundred fifty-five million, six hundred ninety thousand, six hundred twenty-three".