3928931 has 2 divisors, whose sum is σ = 3928932. Its totient is φ = 3928930.

The previous prime is 3928913. The next prime is 3928937. The reversal of 3928931 is 1398293.

Together with previous prime (3928913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3928931 - 2¹⁰ = 3927907 is a prime.

It is a super-2 number, since 2×3928931² = 30872997605522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3928891 and 3928900.

It is not a weakly prime, because it can be changed into another prime (3928937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964465 + 1964466.

It is an arithmetic number, because the mean of its divisors is an integer number (1964466).

Almost surely, 2^3928931 is an apocalyptic number.

3928931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928931 is an equidigital number, since it uses as much as digits as its factorization.

3928931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 3928931 is about 1982.1531222385. The cubic root of 3928931 is about 157.7943567222.

The spelling of 3928931 in words is "three million, nine hundred twenty-eight thousand, nine hundred thirty-one".