1447989121 has 2 divisors, whose sum is σ = 1447989122. Its totient is φ = 1447989120.

The previous prime is 1447989089. The next prime is 1447989167. The reversal of 1447989121 is 1219897441.

It is an a-pointer prime, because the next prime (1447989167) can be obtained adding 1447989121 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1419782400 + 28206721 = 37680^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1447989121 - 2⁵ = 1447989089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1447989721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723994560 + 723994561.

It is an arithmetic number, because the mean of its divisors is an integer number (723994561).

Almost surely, 2^1447989121 is an apocalyptic number.

It is an amenable number.

1447989121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447989121 is an equidigital number, since it uses as much as digits as its factorization.

1447989121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 1447989121 is about 38052.4522337260. The cubic root of 1447989121 is about 1131.3277318828.

The spelling of 1447989121 in words is "one billion, four hundred forty-seven million, nine hundred eighty-nine thousand, one hundred twenty-one".