255404647 has 2 divisors, whose sum is σ = 255404648. Its totient is φ = 255404646.

The previous prime is 255404609. The next prime is 255404657. The reversal of 255404647 is 746404552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255404647 - 2¹¹ = 255402599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255404657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127702323 + 127702324.

It is an arithmetic number, because the mean of its divisors is an integer number (127702324).

Almost surely, 2^255404647 is an apocalyptic number.

255404647 is a deficient number, since it is larger than the sum of its proper divisors (1).

255404647 is an equidigital number, since it uses as much as digits as its factorization.

255404647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 255404647 is about 15981.3843893450. The cubic root of 255404647 is about 634.4678179022.

The spelling of 255404647 in words is "two hundred fifty-five million, four hundred four thousand, six hundred forty-seven".