3928979 has 2 divisors, whose sum is σ = 3928980. Its totient is φ = 3928978.

The previous prime is 3928973. The next prime is 3928997. The reversal of 3928979 is 9798293.

Together with next prime (3928997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (9798293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3928979 - 2¹² = 3924883 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3928973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964489 + 1964490.

It is an arithmetic number, because the mean of its divisors is an integer number (1964490).

Almost surely, 2^3928979 is an apocalyptic number.

3928979 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928979 is an equidigital number, since it uses as much as digits as its factorization.

3928979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 3928979 is about 1982.1652302470. The cubic root of 3928979 is about 157.7949993141.

The spelling of 3928979 in words is "three million, nine hundred twenty-eight thousand, nine hundred seventy-nine".