253686863 has 2 divisors, whose sum is σ = 253686864. Its totient is φ = 253686862.

The previous prime is 253686859. The next prime is 253686889. The reversal of 253686863 is 368686352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253686863 - 2² = 253686859 is a prime.

It is a Chen prime.

It is equal to p_13869866 and since 253686863 and 13869866 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253286863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126843431 + 126843432.

It is an arithmetic number, because the mean of its divisors is an integer number (126843432).

Almost surely, 2^253686863 is an apocalyptic number.

253686863 is a deficient number, since it is larger than the sum of its proper divisors (1).

253686863 is an equidigital number, since it uses as much as digits as its factorization.

253686863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 47.

The square root of 253686863 is about 15927.5504394116. The cubic root of 253686863 is about 633.0421961660.

The spelling of 253686863 in words is "two hundred fifty-three million, six hundred eighty-six thousand, eight hundred sixty-three".