228077639 has 2 divisors, whose sum is σ = 228077640. Its totient is φ = 228077638.

The previous prime is 228077617. The next prime is 228077651. The reversal of 228077639 is 936770822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228077639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228077639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228073639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114038819 + 114038820.

It is an arithmetic number, because the mean of its divisors is an integer number (114038820).

Almost surely, 2^228077639 is an apocalyptic number.

228077639 is a deficient number, since it is larger than the sum of its proper divisors (1).

228077639 is an equidigital number, since it uses as much as digits as its factorization.

228077639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 228077639 is about 15102.2395359099. The cubic root of 228077639 is about 610.9808094776.

The spelling of 228077639 in words is "two hundred twenty-eight million, seventy-seven thousand, six hundred thirty-nine".