1378533273 has 16 divisors (see below), whose sum is σ = 1984295040. Its totient is φ = 846244224.

The previous prime is 1378533269. The next prime is 1378533287. The reversal of 1378533273 is 3723358731.

It is not a de Polignac number, because 1378533273 - 2² = 1378533269 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378533973) 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, 27261 + ... + 59162.

It is an arithmetic number, because the mean of its divisors is an integer number (124018440).

Almost surely, 2^1378533273 is an apocalyptic number.

1378533273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1378533273 is a deficient number, since it is larger than the sum of its proper divisors (605761767).

1378533273 is a wasteful number, since it uses less digits than its factorization.

1378533273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86848.

The product of its digits is 317520, while the sum is 42.

The square root of 1378533273 is about 37128.6045118854. The cubic root of 1378533273 is about 1112.9417068218.

The spelling of 1378533273 in words is "one billion, three hundred seventy-eight million, five hundred thirty-three thousand, two hundred seventy-three".