3621931 has 2 divisors, whose sum is σ = 3621932. Its totient is φ = 3621930.

The previous prime is 3621929. The next prime is 3621941. The reversal of 3621931 is 1391263.

3621931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3621931 - 2¹ = 3621929 is a prime.

It is a super-2 number, since 2×3621931² = 26236768337522, which contains 22 as substring.

Together with 3621929, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3621896 and 3621905.

It is not a weakly prime, because it can be changed into another prime (3621911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810965 + 1810966.

It is an arithmetic number, because the mean of its divisors is an integer number (1810966).

Almost surely, 2^3621931 is an apocalyptic number.

3621931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621931 is an equidigital number, since it uses as much as digits as its factorization.

3621931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 25.

The square root of 3621931 is about 1903.1371469235. The cubic root of 3621931 is about 153.5724775946.

The spelling of 3621931 in words is "three million, six hundred twenty-one thousand, nine hundred thirty-one".