5651509 has 2 divisors, whose sum is σ = 5651510. Its totient is φ = 5651508.

The previous prime is 5651501. The next prime is 5651519. The reversal of 5651509 is 9051565.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5130225 + 521284 = 2265^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 5651509 - 2³ = 5651501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5651501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825754 + 2825755.

It is an arithmetic number, because the mean of its divisors is an integer number (2825755).

Almost surely, 2^5651509 is an apocalyptic number.

It is an amenable number.

5651509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651509 is an equidigital number, since it uses as much as digits as its factorization.

5651509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 5651509 is about 2377.2902641453. The cubic root of 5651509 is about 178.1236043391.

The spelling of 5651509 in words is "five million, six hundred fifty-one thousand, five hundred nine".