7640109 has 32 divisors (see below), whose sum is σ = 12182400. Its totient is φ = 4717440.

The previous prime is 7640069. The next prime is 7640131. The reversal of 7640109 is 9010467.

7640109 is a `hidden beast` number, since 7 + 640 + 10 + 9 = 666.

It is not a de Polignac number, because 7640109 - 2¹¹ = 7638061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640909) 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 in 31 ways as a sum of consecutive naturals, for example, 27049 + ... + 27329.

It is an arithmetic number, because the mean of its divisors is an integer number (380700).

Almost surely, 2^7640109 is an apocalyptic number.

It is an amenable number.

7640109 is a deficient number, since it is larger than the sum of its proper divisors (4542291).

7640109 is a wasteful number, since it uses less digits than its factorization.

7640109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 7640109 is about 2764.0747095547. The cubic root of 7640109 is about 196.9547767392.

The spelling of 7640109 in words is "seven million, six hundred forty thousand, one hundred nine".