228763643 has 2 divisors, whose sum is σ = 228763644. Its totient is φ = 228763642.

The previous prime is 228763607. The next prime is 228763649. The reversal of 228763643 is 346367822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228763643 - 2⁸ = 228763387 is a prime.

It is equal to p_12578378 and since 228763643 and 12578378 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228763643.

It is not a weakly prime, because it can be changed into another prime (228763649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114381821 + 114381822.

It is an arithmetic number, because the mean of its divisors is an integer number (114381822).

Almost surely, 2^228763643 is an apocalyptic number.

228763643 is a deficient number, since it is larger than the sum of its proper divisors (1).

228763643 is an equidigital number, since it uses as much as digits as its factorization.

228763643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 41.

The square root of 228763643 is about 15124.9344791969. The cubic root of 228763643 is about 611.5927586391.

The spelling of 228763643 in words is "two hundred twenty-eight million, seven hundred sixty-three thousand, six hundred forty-three".