3928651 has 2 divisors, whose sum is σ = 3928652. Its totient is φ = 3928650.

The previous prime is 3928637. The next prime is 3928663. The reversal of 3928651 is 1568293.

It is a strong prime.

It is an emirp because it is prime and its reverse (1568293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3928651 - 2⁵ = 3928619 is a prime.

It is not a weakly prime, because it can be changed into another prime (3928621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964325 + 1964326.

It is an arithmetic number, because the mean of its divisors is an integer number (1964326).

Almost surely, 2^3928651 is an apocalyptic number.

3928651 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928651 is an equidigital number, since it uses as much as digits as its factorization.

3928651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 3928651 is about 1982.0824907153. The cubic root of 3928651 is about 157.7906081648.

The spelling of 3928651 in words is "three million, nine hundred twenty-eight thousand, six hundred fifty-one".