3931801 has 2 divisors, whose sum is σ = 3931802. Its totient is φ = 3931800.

The previous prime is 3931799. The next prime is 3931813. The reversal of 3931801 is 1081393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3904576 + 27225 = 1976^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 3931801 - 2¹ = 3931799 is a prime.

Together with 3931799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3931831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965900 + 1965901.

It is an arithmetic number, because the mean of its divisors is an integer number (1965901).

Almost surely, 2^3931801 is an apocalyptic number.

It is an amenable number.

3931801 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931801 is an equidigital number, since it uses as much as digits as its factorization.

3931801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 3931801 is about 1982.8769502922. The cubic root of 3931801 is about 157.8327691706.

The spelling of 3931801 in words is "three million, nine hundred thirty-one thousand, eight hundred one".