7555649 has 2 divisors, whose sum is σ = 7555650. Its totient is φ = 7555648.

The previous prime is 7555637. The next prime is 7555651. The reversal of 7555649 is 9465557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4545424 + 3010225 = 2132^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 7555649 - 2⁸ = 7555393 is a prime.

It is a super-2 number, since 2×7555649² = 114175663622402, which contains 22 as substring.

Together with 7555651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7555679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3777824 + 3777825.

It is an arithmetic number, because the mean of its divisors is an integer number (3777825).

Almost surely, 2^7555649 is an apocalyptic number.

It is an amenable number.

7555649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7555649 is an equidigital number, since it uses as much as digits as its factorization.

7555649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 41.

The square root of 7555649 is about 2748.7540813976. The cubic root of 7555649 is about 196.2263195087.

The spelling of 7555649 in words is "seven million, five hundred fifty-five thousand, six hundred forty-nine".