228917077 has 2 divisors, whose sum is σ = 228917078. Its totient is φ = 228917076.

The previous prime is 228917047. The next prime is 228917081. The reversal of 228917077 is 770719822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172501956 + 56415121 = 13134^2 + 7511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228917077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228917047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114458538 + 114458539.

It is an arithmetic number, because the mean of its divisors is an integer number (114458539).

Almost surely, 2^228917077 is an apocalyptic number.

It is an amenable number.

228917077 is a deficient number, since it is larger than the sum of its proper divisors (1).

228917077 is an equidigital number, since it uses as much as digits as its factorization.

228917077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 228917077 is about 15130.0058493049. The cubic root of 228917077 is about 611.7294618178.

The spelling of 228917077 in words is "two hundred twenty-eight million, nine hundred seventeen thousand, seventy-seven".