1938977996939 has 4 divisors (see below), whose sum is σ = 1938984789456. Its totient is φ = 1938971204424.

The previous prime is 1938977996929. The next prime is 1938977996957. The reversal of 1938977996939 is 9396997798391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1938977996939 - 2⁴⁰ = 839466369163 is a prime.

It is a super-2 number, since 2×1938977996939² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938977996929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948384 + ... + 3545549.

It is an arithmetic number, because the mean of its divisors is an integer number (484746197364).

Almost surely, 2^{1938977996939} is an apocalyptic number.

1938977996939 is a deficient number, since it is larger than the sum of its proper divisors (6792517).

1938977996939 is an equidigital number, since it uses as much as digits as its factorization.

1938977996939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792516.

The product of its digits is 11249543088, while the sum is 89.

The spelling of 1938977996939 in words is "one trillion, nine hundred thirty-eight billion, nine hundred seventy-seven million, nine hundred ninety-six thousand, nine hundred thirty-nine".