1938933331 has 2 divisors, whose sum is σ = 1938933332. Its totient is φ = 1938933330.

The previous prime is 1938933329. The next prime is 1938933341. The reversal of 1938933331 is 1333398391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1938933331 - 2¹ = 1938933329 is a prime.

It is a super-2 number, since 2×1938933331² = 7518924924125511122, which contains 22 as substring.

Together with 1938933329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1938933341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969466665 + 969466666.

It is an arithmetic number, because the mean of its divisors is an integer number (969466666).

Almost surely, 2^1938933331 is an apocalyptic number.

1938933331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938933331 is an equidigital number, since it uses as much as digits as its factorization.

1938933331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 43.

The square root of 1938933331 is about 44033.3206901319. The cubic root of 1938933331 is about 1246.9650813251.

The spelling of 1938933331 in words is "one billion, nine hundred thirty-eight million, nine hundred thirty-three thousand, three hundred thirty-one".