256998103 has 2 divisors, whose sum is σ = 256998104. Its totient is φ = 256998102.

The previous prime is 256998101. The next prime is 256998109. The reversal of 256998103 is 301899652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256998103 - 2¹ = 256998101 is a prime.

Together with 256998101, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 256998103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256998101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128499051 + 128499052.

It is an arithmetic number, because the mean of its divisors is an integer number (128499052).

Almost surely, 2^256998103 is an apocalyptic number.

256998103 is a deficient number, since it is larger than the sum of its proper divisors (1).

256998103 is an equidigital number, since it uses as much as digits as its factorization.

256998103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 256998103 is about 16031.1603759678. The cubic root of 256998103 is about 635.7845536553.

The spelling of 256998103 in words is "two hundred fifty-six million, nine hundred ninety-eight thousand, one hundred three".