7564649 has 2 divisors, whose sum is σ = 7564650. Its totient is φ = 7564648.

The previous prime is 7564619. The next prime is 7564657. The reversal of 7564649 is 9464657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 1708249 = 2420^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 7564649 - 2²⁰ = 6516073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7564619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3782324 + 3782325.

It is an arithmetic number, because the mean of its divisors is an integer number (3782325).

Almost surely, 2^7564649 is an apocalyptic number.

It is an amenable number.

7564649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7564649 is an equidigital number, since it uses as much as digits as its factorization.

7564649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 7564649 is about 2750.3906995189. The cubic root of 7564649 is about 196.3042010217.

The spelling of 7564649 in words is "seven million, five hundred sixty-four thousand, six hundred forty-nine".