51004609 has 2 divisors, whose sum is σ = 51004610. Its totient is φ = 51004608.

The previous prime is 51004553. The next prime is 51004619. The reversal of 51004609 is 90640015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34480384 + 16524225 = 5872^2 + 4065^2 .

It is a cyclic number.

It is not a de Polignac number, because 51004609 - 2¹³ = 50996417 is a prime.

It is not a weakly prime, because it can be changed into another prime (51004619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502304 + 25502305.

It is an arithmetic number, because the mean of its divisors is an integer number (25502305).

Almost surely, 2^51004609 is an apocalyptic number.

It is an amenable number.

51004609 is a deficient number, since it is larger than the sum of its proper divisors (1).

51004609 is an equidigital number, since it uses as much as digits as its factorization.

51004609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 51004609 is about 7141.7511157979. The cubic root of 51004609 is about 370.8541479318.

The spelling of 51004609 in words is "fifty-one million, four thousand, six hundred nine".