3625665391 has 2 divisors, whose sum is σ = 3625665392. Its totient is φ = 3625665390.

The previous prime is 3625665343. The next prime is 3625665397. The reversal of 3625665391 is 1935665263.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3625665391 - 2⁹ = 3625664879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3625665397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1812832695 + 1812832696.

It is an arithmetic number, because the mean of its divisors is an integer number (1812832696).

Almost surely, 2^3625665391 is an apocalyptic number.

3625665391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3625665391 is an equidigital number, since it uses as much as digits as its factorization.

3625665391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 46.

The square root of 3625665391 is about 60213.4984119010. The cubic root of 3625665391 is about 1536.2523975278.

The spelling of 3625665391 in words is "three billion, six hundred twenty-five million, six hundred sixty-five thousand, three hundred ninety-one".