3878933189 has 2 divisors, whose sum is σ = 3878933190. Its totient is φ = 3878933188.

The previous prime is 3878933161. The next prime is 3878933203. The reversal of 3878933189 is 9813398783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3048917089 + 830016100 = 55217^2 + 28810^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878933189 - 2²⁸ = 3610497733 is a prime.

It is a super-2 number, since 2×3878933189² = 30092245369451419442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878930189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939466594 + 1939466595.

It is an arithmetic number, because the mean of its divisors is an integer number (1939466595).

Almost surely, 2^3878933189 is an apocalyptic number.

It is an amenable number.

3878933189 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878933189 is an equidigital number, since it uses as much as digits as its factorization.

3878933189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 59.

The square root of 3878933189 is about 62281.0821116653. The cubic root of 3878933189 is about 1571.2215720361.

The spelling of 3878933189 in words is "three billion, eight hundred seventy-eight million, nine hundred thirty-three thousand, one hundred eighty-nine".