7641609 has 4 divisors (see below), whose sum is σ = 10188816. Its totient is φ = 5094404.

The previous prime is 7641533. The next prime is 7641611. The reversal of 7641609 is 9061467.

It is a happy number.

7641609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7641609 - 2⁸ = 7641353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7641609.

It is not an unprimeable number, because it can be changed into a prime (7641649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273599 + ... + 1273604.

It is an arithmetic number, because the mean of its divisors is an integer number (2547204).

Almost surely, 2^7641609 is an apocalyptic number.

It is an amenable number.

7641609 is a deficient number, since it is larger than the sum of its proper divisors (2547207).

7641609 is a wasteful number, since it uses less digits than its factorization.

7641609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547206.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 7641609 is about 2764.3460347793. The cubic root of 7641609 is about 196.9676654224.

The spelling of 7641609 in words is "seven million, six hundred forty-one thousand, six hundred nine".