228297987899 has 2 divisors, whose sum is σ = 228297987900. Its totient is φ = 228297987898.

The previous prime is 228297987823. The next prime is 228297987991. The reversal of 228297987899 is 998789792822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228297987899 - 2¹² = 228297983803 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (228297987809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114148993949 + 114148993950.

It is an arithmetic number, because the mean of its divisors is an integer number (114148993950).

Almost surely, 2^228297987899 is an apocalyptic number.

228297987899 is a deficient number, since it is larger than the sum of its proper divisors (1).

228297987899 is an equidigital number, since it uses as much as digits as its factorization.

228297987899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1316818944, while the sum is 80.

The spelling of 228297987899 in words is "two hundred twenty-eight billion, two hundred ninety-seven million, nine hundred eighty-seven thousand, eight hundred ninety-nine".