1938893893 has 8 divisors (see below), whose sum is σ = 2042600000. Its totient is φ = 1835353728.

The previous prime is 1938893863. The next prime is 1938893899. The reversal of 1938893893 is 3983988391.

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 1938893893 - 2⁹ = 1938893381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938893899) 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, 17121 + ... + 64582.

It is an arithmetic number, because the mean of its divisors is an integer number (255325000).

Almost surely, 2^1938893893 is an apocalyptic number.

It is an amenable number.

1938893893 is a deficient number, since it is larger than the sum of its proper divisors (103706107).

1938893893 is a wasteful number, since it uses less digits than its factorization.

1938893893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82971.

The product of its digits is 10077696, while the sum is 61.

The square root of 1938893893 is about 44032.8728678927. The cubic root of 1938893893 is about 1246.9566268239.

The spelling of 1938893893 in words is "one billion, nine hundred thirty-eight million, eight hundred ninety-three thousand, eight hundred ninety-three".