228409967 has 2 divisors, whose sum is σ = 228409968. Its totient is φ = 228409966.

The previous prime is 228409921. The next prime is 228409969. The reversal of 228409967 is 769904822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228409967 is a prime.

It is a super-2 number, since 2×228409967² = 104342226049882178, which contains 22 as substring.

Together with 228409969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228409969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114204983 + 114204984.

It is an arithmetic number, because the mean of its divisors is an integer number (114204984).

Almost surely, 2^228409967 is an apocalyptic number.

228409967 is a deficient number, since it is larger than the sum of its proper divisors (1).

228409967 is an equidigital number, since it uses as much as digits as its factorization.

228409967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 228409967 is about 15113.2381374740. The cubic root of 228409967 is about 611.2774153363.

The spelling of 228409967 in words is "two hundred twenty-eight million, four hundred nine thousand, nine hundred sixty-seven".