1938581013 has 8 divisors (see below), whose sum is σ = 2697156288. Its totient is φ = 1236196544.

The previous prime is 1938581003. The next prime is 1938581017. The reversal of 1938581013 is 3101858391.

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 1938581013 - 2⁶ = 1938580949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938581017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14047620 + ... + 14047757.

It is an arithmetic number, because the mean of its divisors is an integer number (337144536).

Almost surely, 2^1938581013 is an apocalyptic number.

It is an amenable number.

1938581013 is a deficient number, since it is larger than the sum of its proper divisors (758575275).

1938581013 is a wasteful number, since it uses less digits than its factorization.

1938581013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28095403.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1938581013 is about 44029.3199243413. The cubic root of 1938581013 is about 1246.8895492702.

The spelling of 1938581013 in words is "one billion, nine hundred thirty-eight million, five hundred eighty-one thousand, thirteen".