75312493 has 2 divisors, whose sum is σ = 75312494. Its totient is φ = 75312492.

The previous prime is 75312481. The next prime is 75312521. The reversal of 75312493 is 39421357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 887364 = 8627^2 + 942^2 .

It is an emirp because it is prime and its reverse (39421357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75312493 - 2⁹ = 75311981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75312443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37656246 + 37656247.

It is an arithmetic number, because the mean of its divisors is an integer number (37656247).

Almost surely, 2^75312493 is an apocalyptic number.

It is an amenable number.

75312493 is a deficient number, since it is larger than the sum of its proper divisors (1).

75312493 is an equidigital number, since it uses as much as digits as its factorization.

75312493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 75312493 is about 8678.2770755490. The cubic root of 75312493 is about 422.3012250777.

The spelling of 75312493 in words is "seventy-five million, three hundred twelve thousand, four hundred ninety-three".