1378731283 has 4 divisors (see below), whose sum is σ = 1382704920. Its totient is φ = 1374757648.

The previous prime is 1378731247. The next prime is 1378731301. The reversal of 1378731283 is 3821378731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3821378731 = 359 ⋅10644509.

It is a cyclic number.

It is not a de Polignac number, because 1378731283 - 2²⁵ = 1345176851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378731083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986298 + ... + 1986991.

It is an arithmetic number, because the mean of its divisors is an integer number (345676230).

Almost surely, 2^1378731283 is an apocalyptic number.

1378731283 is a deficient number, since it is larger than the sum of its proper divisors (3973637).

1378731283 is an equidigital number, since it uses as much as digits as its factorization.

1378731283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973636.

The product of its digits is 169344, while the sum is 43.

The square root of 1378731283 is about 37131.2709585869. The cubic root of 1378731283 is about 1112.9949912416.

The spelling of 1378731283 in words is "one billion, three hundred seventy-eight million, seven hundred thirty-one thousand, two hundred eighty-three".