228687637 has 2 divisors, whose sum is σ = 228687638. Its totient is φ = 228687636.

The previous prime is 228687623. The next prime is 228687653. The reversal of 228687637 is 736786822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203946961 + 24740676 = 14281^2 + 4974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228687637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228687737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114343818 + 114343819.

It is an arithmetic number, because the mean of its divisors is an integer number (114343819).

Almost surely, 2^228687637 is an apocalyptic number.

It is an amenable number.

228687637 is a deficient number, since it is larger than the sum of its proper divisors (1).

228687637 is an equidigital number, since it uses as much as digits as its factorization.

228687637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 228687637 is about 15122.4216645351. The cubic root of 228687637 is about 611.5250178803.

The spelling of 228687637 in words is "two hundred twenty-eight million, six hundred eighty-seven thousand, six hundred thirty-seven".