1228993249 has 9 divisors (see below), whose sum is σ = 1351300881. Its totient is φ = 1116916020.

The previous prime is 1228993229. The next prime is 1228993303. The reversal of 1228993249 is 9423998221.

The square root of 1228993249 is 35057.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1228993249 - 2¹³ = 1228985057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228993229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 384034 + ... + 387220.

Almost surely, 2^1228993249 is an apocalyptic number.

1228993249 is the 35057-th square number.

1228993249 is the 17529-th centered octagonal number.

It is an amenable number.

1228993249 is a deficient number, since it is larger than the sum of its proper divisors (122307632).

1228993249 is an frugal number, since it uses more digits than its factorization.

1228993249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396 (or 3198 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The cubic root of 1228993249 is about 1071.1488661675.

Multiplying 1228993249 by its sum of digits (49), we get a square (60220669201 = 245399²).

The spelling of 1228993249 in words is "one billion, two hundred twenty-eight million, nine hundred ninety-three thousand, two hundred forty-nine".