53651009 has 2 divisors, whose sum is σ = 53651010. Its totient is φ = 53651008.

The previous prime is 53650969. The next prime is 53651011. The reversal of 53651009 is 90015635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 13897984 = 6305^2 + 3728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53651009 is a prime.

Together with 53651011, 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 (53651089) 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 as a sum of consecutive naturals, namely, 26825504 + 26825505.

It is an arithmetic number, because the mean of its divisors is an integer number (26825505).

Almost surely, 2^53651009 is an apocalyptic number.

It is an amenable number.

53651009 is a deficient number, since it is larger than the sum of its proper divisors (1).

53651009 is an equidigital number, since it uses as much as digits as its factorization.

53651009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 53651009 is about 7324.6849078988. The cubic root of 53651009 is about 377.1602931986.

The spelling of 53651009 in words is "fifty-three million, six hundred fifty-one thousand, nine".