1938863231 has 2 divisors, whose sum is σ = 1938863232. Its totient is φ = 1938863230.

The previous prime is 1938863221. The next prime is 1938863239. The reversal of 1938863231 is 1323688391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1938863231 - 2⁶ = 1938863167 is a prime.

It is a super-2 number, since 2×1938863231² = 7518381257047518722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938863239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969431615 + 969431616.

It is an arithmetic number, because the mean of its divisors is an integer number (969431616).

Almost surely, 2^1938863231 is an apocalyptic number.

1938863231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938863231 is an equidigital number, since it uses as much as digits as its factorization.

1938863231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 1938863231 is about 44032.5246948208. The cubic root of 1938863231 is about 1246.9500535940.

The spelling of 1938863231 in words is "one billion, nine hundred thirty-eight million, eight hundred sixty-three thousand, two hundred thirty-one".