228963961 has 4 divisors (see below), whose sum is σ = 236859300. Its totient is φ = 221068624.

The previous prime is 228963937. The next prime is 228964031. The reversal of 228963961 is 169369822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65610000 + 163353961 = 8100^2 + 12781^2 .

It is not a de Polignac number, because 228963961 - 2²³ = 220575353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228960961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3947626 + ... + 3947683.

It is an arithmetic number, because the mean of its divisors is an integer number (59214825).

Almost surely, 2^228963961 is an apocalyptic number.

It is an amenable number.

228963961 is a deficient number, since it is larger than the sum of its proper divisors (7895339).

228963961 is an equidigital number, since it uses as much as digits as its factorization.

228963961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7895338.

The product of its digits is 279936, while the sum is 46.

The square root of 228963961 is about 15131.5551414916. Note that the first 3 decimals coincide. The cubic root of 228963961 is about 611.7712212862.

The spelling of 228963961 in words is "two hundred twenty-eight million, nine hundred sixty-three thousand, nine hundred sixty-one".