1938376729 has 3 divisors (see below), whose sum is σ = 1938420757. Its totient is φ = 1938332702.

The previous prime is 1938376709. The next prime is 1938376753. The reversal of 1938376729 is 9276738391.

It is a happy number.

The square root of 1938376729 is 44027.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1938376729 - 2¹¹ = 1938374681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1938376729.

It is not an unprimeable number, because it can be changed into a prime (1938376709) 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 2 ways as a sum of consecutive naturals, for example, 22014 + ... + 66040.

Almost surely, 2^1938376729 is an apocalyptic number.

1938376729 is the 44027-th square number.

1938376729 is the 22014-th centered octagonal number.

It is an amenable number.

1938376729 is a deficient number, since it is larger than the sum of its proper divisors (44028).

1938376729 is an frugal number, since it uses more digits than its factorization.

1938376729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88054 (or 44027 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 55.

The cubic root of 1938376729 is about 1246.8457494444.

The spelling of 1938376729 in words is "one billion, nine hundred thirty-eight million, three hundred seventy-six thousand, seven hundred twenty-nine".