1378992273 has 4 divisors (see below), whose sum is σ = 1838656368. Its totient is φ = 919328180.

The previous prime is 1378992259. The next prime is 1378992283. The reversal of 1378992273 is 3722998731.

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 1378992273 - 2¹⁶ = 1378926737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378992283) 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 3 ways as a sum of consecutive naturals, for example, 229832043 + ... + 229832048.

It is an arithmetic number, because the mean of its divisors is an integer number (459664092).

Almost surely, 2^1378992273 is an apocalyptic number.

It is an amenable number.

1378992273 is a deficient number, since it is larger than the sum of its proper divisors (459664095).

1378992273 is an equidigital number, since it uses as much as digits as its factorization.

1378992273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459664094.

The product of its digits is 1143072, while the sum is 51.

The square root of 1378992273 is about 37134.7852154823. The cubic root of 1378992273 is about 1113.0652157636.

The spelling of 1378992273 in words is "one billion, three hundred seventy-eight million, nine hundred ninety-two thousand, two hundred seventy-three".