1389447297 has 32 divisors (see below), whose sum is σ = 2354432000. Its totient is φ = 793319184.

The previous prime is 1389447271. The next prime is 1389447317. The reversal of 1389447297 is 7927449831.

1389447297 is a `hidden beast` number, since 1 + 3 + 89 + 4 + 472 + 97 = 666.

It is not a de Polignac number, because 1389447297 - 2¹⁰ = 1389446273 is a prime.

It is a super-2 number, since 2×1389447297² = 3861127582281212418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389447097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318948 + ... + 323274.

It is an arithmetic number, because the mean of its divisors is an integer number (73576000).

Almost surely, 2^1389447297 is an apocalyptic number.

It is an amenable number.

1389447297 is a deficient number, since it is larger than the sum of its proper divisors (964984703).

1389447297 is a wasteful number, since it uses less digits than its factorization.

1389447297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6042 (or 6036 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1389447297 is about 37275.2907030918. The cubic root of 1389447297 is about 1115.8710901512.

The spelling of 1389447297 in words is "one billion, three hundred eighty-nine million, four hundred forty-seven thousand, two hundred ninety-seven".