3625991 has 2 divisors, whose sum is σ = 3625992. Its totient is φ = 3625990.

The previous prime is 3625987. The next prime is 3625997. The reversal of 3625991 is 1995263.

3625991 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 an emirp because it is prime and its reverse (1995263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3625991 - 2² = 3625987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3625997) 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, 1812995 + 1812996.

It is an arithmetic number, because the mean of its divisors is an integer number (1812996).

Almost surely, 2^3625991 is an apocalyptic number.

3625991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3625991 is an equidigital number, since it uses as much as digits as its factorization.

3625991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 3625991 is about 1904.2035080316. The cubic root of 3625991 is about 153.6298384731.

The spelling of 3625991 in words is "three million, six hundred twenty-five thousand, nine hundred ninety-one".