228978719 has 2 divisors, whose sum is σ = 228978720. Its totient is φ = 228978718.

The previous prime is 228978697. The next prime is 228978733. The reversal of 228978719 is 917879822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228978719 - 2²⁴ = 212201503 is a prime.

It is a super-2 number, since 2×228978719² = 104862507509761922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228978749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114489359 + 114489360.

It is an arithmetic number, because the mean of its divisors is an integer number (114489360).

Almost surely, 2^228978719 is an apocalyptic number.

228978719 is a deficient number, since it is larger than the sum of its proper divisors (1).

228978719 is an equidigital number, since it uses as much as digits as its factorization.

228978719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 53.

The square root of 228978719 is about 15132.0427900532. The cubic root of 228978719 is about 611.7843650224.

The spelling of 228978719 in words is "two hundred twenty-eight million, nine hundred seventy-eight thousand, seven hundred nineteen".