1381923518 has 8 divisors (see below), whose sum is σ = 2139752640. Its totient is φ = 668672640.

The previous prime is 1381923493. The next prime is 1381923527. The reversal of 1381923518 is 8153291831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144483 + ... + 11144606.

It is an arithmetic number, because the mean of its divisors is an integer number (267469080).

Almost surely, 2^1381923518 is an apocalyptic number.

1381923518 is a deficient number, since it is larger than the sum of its proper divisors (757829122).

1381923518 is a wasteful number, since it uses less digits than its factorization.

1381923518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22289122.

The product of its digits is 51840, while the sum is 41.

The square root of 1381923518 is about 37174.2319086757. The cubic root of 1381923518 is about 1113.8533173078.

The spelling of 1381923518 in words is "one billion, three hundred eighty-one million, nine hundred twenty-three thousand, five hundred eighteen".