75617609 has 2 divisors, whose sum is σ = 75617610. Its totient is φ = 75617608.

The previous prime is 75617599. The next prime is 75617617. The reversal of 75617609 is 90671657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55547209 + 20070400 = 7453^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 75617609 - 2¹² = 75613513 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 (75617699) 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, 37808804 + 37808805.

It is an arithmetic number, because the mean of its divisors is an integer number (37808805).

Almost surely, 2^75617609 is an apocalyptic number.

It is an amenable number.

75617609 is a deficient number, since it is larger than the sum of its proper divisors (1).

75617609 is an equidigital number, since it uses as much as digits as its factorization.

75617609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 75617609 is about 8695.8386024581. The cubic root of 75617609 is about 422.8707509741.

The spelling of 75617609 in words is "seventy-five million, six hundred seventeen thousand, six hundred nine".