228761437 has 2 divisors, whose sum is σ = 228761438. Its totient is φ = 228761436.

The previous prime is 228761413. The next prime is 228761441. The reversal of 228761437 is 734167822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194351481 + 34409956 = 13941^2 + 5866^2 .

It is a cyclic number.

It is not a de Polignac number, because 228761437 - 2²³ = 220372829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228761437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228761447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114380718 + 114380719.

It is an arithmetic number, because the mean of its divisors is an integer number (114380719).

Almost surely, 2^228761437 is an apocalyptic number.

It is an amenable number.

228761437 is a deficient number, since it is larger than the sum of its proper divisors (1).

228761437 is an equidigital number, since it uses as much as digits as its factorization.

228761437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 228761437 is about 15124.8615530854. The cubic root of 228761437 is about 611.5907927411.

The spelling of 228761437 in words is "two hundred twenty-eight million, seven hundred sixty-one thousand, four hundred thirty-seven".