75480709 has 2 divisors, whose sum is σ = 75480710. Its totient is φ = 75480708.

The previous prime is 75480701. The next prime is 75480751. The reversal of 75480709 is 90708457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69255684 + 6225025 = 8322^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 75480709 - 2³ = 75480701 is a prime.

It is a super-2 number, since 2×75480709² = 11394674862285362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75480701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37740354 + 37740355.

It is an arithmetic number, because the mean of its divisors is an integer number (37740355).

Almost surely, 2^75480709 is an apocalyptic number.

It is an amenable number.

75480709 is a deficient number, since it is larger than the sum of its proper divisors (1).

75480709 is an equidigital number, since it uses as much as digits as its factorization.

75480709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 75480709 is about 8687.9634552638. The cubic root of 75480709 is about 422.6154049088.

The spelling of 75480709 in words is "seventy-five million, four hundred eighty thousand, seven hundred nine".