3928166731 has 2 divisors, whose sum is σ = 3928166732. Its totient is φ = 3928166730.

The previous prime is 3928166729. The next prime is 3928166747. The reversal of 3928166731 is 1376618293.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3928166731 - 2¹ = 3928166729 is a prime.

It is a super-2 number, since 2×3928166731² = 30860987733070452722, which contains 22 as substring.

Together with 3928166729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3928166771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964083365 + 1964083366.

It is an arithmetic number, because the mean of its divisors is an integer number (1964083366).

Almost surely, 2^3928166731 is an apocalyptic number.

3928166731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928166731 is an equidigital number, since it uses as much as digits as its factorization.

3928166731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 3928166731 is about 62675.0885998576. The cubic root of 3928166731 is about 1577.8412449396.

The spelling of 3928166731 in words is "three billion, nine hundred twenty-eight million, one hundred sixty-six thousand, seven hundred thirty-one".