75480991 has 2 divisors, whose sum is σ = 75480992. Its totient is φ = 75480990.

The previous prime is 75480893. The next prime is 75481019. The reversal of 75480991 is 19908457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75480991 - 2⁹ = 75480479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75480791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37740495 + 37740496.

It is an arithmetic number, because the mean of its divisors is an integer number (37740496).

Almost surely, 2^75480991 is an apocalyptic number.

75480991 is a deficient number, since it is larger than the sum of its proper divisors (1).

75480991 is an equidigital number, since it uses as much as digits as its factorization.

75480991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 75480991 is about 8687.9796845987. The cubic root of 75480991 is about 422.6159312128.

The spelling of 75480991 in words is "seventy-five million, four hundred eighty thousand, nine hundred ninety-one".