1381023993 has 8 divisors (see below), whose sum is σ = 1904860800. Its totient is φ = 888934928.

The previous prime is 1381023971. The next prime is 1381023997. The reversal of 1381023993 is 3993201831.

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

It is a cyclic number.

It is not a de Polignac number, because 1381023993 - 2⁵ = 1381023961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381023997) 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 7 ways as a sum of consecutive naturals, for example, 7936833 + ... + 7937006.

It is an arithmetic number, because the mean of its divisors is an integer number (238107600).

Almost surely, 2^1381023993 is an apocalyptic number.

It is an amenable number.

1381023993 is a deficient number, since it is larger than the sum of its proper divisors (523836807).

1381023993 is a wasteful number, since it uses less digits than its factorization.

1381023993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15873871.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 1381023993 is about 37162.1311687045. The cubic root of 1381023993 is about 1113.6115874857.

The spelling of 1381023993 in words is "one billion, three hundred eighty-one million, twenty-three thousand, nine hundred ninety-three".