1938942667 has 4 divisors (see below), whose sum is σ = 2052998136. Its totient is φ = 1824887200.

The previous prime is 1938942641. The next prime is 1938942671. The reversal of 1938942667 is 7662498391.

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 1938942667 - 2¹⁹ = 1938418379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938949667) 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, 57027709 + ... + 57027742.

It is an arithmetic number, because the mean of its divisors is an integer number (513249534).

Almost surely, 2^1938942667 is an apocalyptic number.

1938942667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1938942667 is a deficient number, since it is larger than the sum of its proper divisors (114055469).

1938942667 is a wasteful number, since it uses less digits than its factorization.

1938942667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114055468.

The product of its digits is 3919104, while the sum is 55.

The square root of 1938942667 is about 44033.4267006328. The cubic root of 1938942667 is about 1246.9670827085.

The spelling of 1938942667 in words is "one billion, nine hundred thirty-eight million, nine hundred forty-two thousand, six hundred sixty-seven".