1227001649 has 4 divisors (see below), whose sum is σ = 1227170880. Its totient is φ = 1226832420.

The previous prime is 1227001609. The next prime is 1227001651. The reversal of 1227001649 is 9461007221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1227001649 - 2¹² = 1226997553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227001609) 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 3 ways as a sum of consecutive naturals, for example, 73229 + ... + 88410.

It is an arithmetic number, because the mean of its divisors is an integer number (306792720).

Almost surely, 2^1227001649 is an apocalyptic number.

It is an amenable number.

1227001649 is a deficient number, since it is larger than the sum of its proper divisors (169231).

1227001649 is an equidigital number, since it uses as much as digits as its factorization.

1227001649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169230.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1227001649 is about 35028.5833142021. The cubic root of 1227001649 is about 1070.5699496521.

The spelling of 1227001649 in words is "one billion, two hundred twenty-seven million, one thousand, six hundred forty-nine".