1378489131 has 16 divisors (see below), whose sum is σ = 2097402400. Its totient is φ = 894154464.

The previous prime is 1378489129. The next prime is 1378489169. The reversal of 1378489131 is 1319848731.

1378489131 is a `hidden beast` number, since 1 + 37 + 8 + 489 + 131 = 666.

It is not a de Polignac number, because 1378489131 - 2¹ = 1378489129 is a prime.

It is a super-2 number, since 2×1378489131² = 3800464568570270322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378489111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688936 + ... + 690933.

It is an arithmetic number, because the mean of its divisors is an integer number (131087650).

Almost surely, 2^1378489131 is an apocalyptic number.

1378489131 is a deficient number, since it is larger than the sum of its proper divisors (718913269).

1378489131 is a wasteful number, since it uses less digits than its factorization.

1378489131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379915 (or 1379909 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1378489131 is about 37128.0100597918. The cubic root of 1378489131 is about 1112.9298275300.

The spelling of 1378489131 in words is "one billion, three hundred seventy-eight million, four hundred eighty-nine thousand, one hundred thirty-one".