3878933161 has 2 divisors, whose sum is σ = 3878933162. Its totient is φ = 3878933160.

The previous prime is 3878933117. The next prime is 3878933189. The reversal of 3878933161 is 1613398783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3380259600 + 498673561 = 58140^2 + 22331^2 .

It is an emirp because it is prime and its reverse (1613398783) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3878933161 is a prime.

It is a super-2 number, since 2×3878933161² = 30092244935010903842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3878933561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939466580 + 1939466581.

It is an arithmetic number, because the mean of its divisors is an integer number (1939466581).

Almost surely, 2^3878933161 is an apocalyptic number.

It is an amenable number.

3878933161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878933161 is an equidigital number, since it uses as much as digits as its factorization.

3878933161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 3878933161 is about 62281.0818868780. The cubic root of 3878933161 is about 1571.2215682554.

The spelling of 3878933161 in words is "three billion, eight hundred seventy-eight million, nine hundred thirty-three thousand, one hundred sixty-one".