1229964777 has 16 divisors (see below), whose sum is σ = 1852044160. Its totient is φ = 806533200.

The previous prime is 1229964731. The next prime is 1229964793. The reversal of 1229964777 is 7774699221.

It is not a de Polignac number, because 1229964777 - 2⁸ = 1229964521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229964797) 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 in 15 ways as a sum of consecutive naturals, for example, 371749 + ... + 375042.

It is an arithmetic number, because the mean of its divisors is an integer number (115752760).

Almost surely, 2^1229964777 is an apocalyptic number.

It is an amenable number.

1229964777 is a deficient number, since it is larger than the sum of its proper divisors (622079383).

1229964777 is an equidigital number, since it uses as much as digits as its factorization.

1229964777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746861 (or 746855 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 1229964777 is about 35070.8536679677. The cubic root of 1229964777 is about 1071.4310421200.

The spelling of 1229964777 in words is "one billion, two hundred twenty-nine million, nine hundred sixty-four thousand, seven hundred seventy-seven".