228612739 has 2 divisors, whose sum is σ = 228612740. Its totient is φ = 228612738.

The previous prime is 228612737. The next prime is 228612743. The reversal of 228612739 is 937216822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228612739 - 2¹ = 228612737 is a prime.

Together with 228612737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (228612737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114306369 + 114306370.

It is an arithmetic number, because the mean of its divisors is an integer number (114306370).

Almost surely, 2^228612739 is an apocalyptic number.

228612739 is a deficient number, since it is larger than the sum of its proper divisors (1).

228612739 is an equidigital number, since it uses as much as digits as its factorization.

228612739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 228612739 is about 15119.9450726516. The cubic root of 228612739 is about 611.4582499481.

It can be divided in two parts, 22861 and 2739, that added together give a square (25600 = 160²).

The spelling of 228612739 in words is "two hundred twenty-eight million, six hundred twelve thousand, seven hundred thirty-nine".