75497497 has 2 divisors, whose sum is σ = 75497498. Its totient is φ = 75497496.

The previous prime is 75497491. The next prime is 75497519. The reversal of 75497497 is 79479457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60279696 + 15217801 = 7764^2 + 3901^2 .

It is an emirp because it is prime and its reverse (79479457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75497497 - 2³ = 75497489 is a prime.

It is not a weakly prime, because it can be changed into another prime (75497491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37748748 + 37748749.

It is an arithmetic number, because the mean of its divisors is an integer number (37748749).

Almost surely, 2^75497497 is an apocalyptic number.

It is an amenable number.

75497497 is a deficient number, since it is larger than the sum of its proper divisors (1).

75497497 is an equidigital number, since it uses as much as digits as its factorization.

75497497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 52.

The square root of 75497497 is about 8688.9295658326. The cubic root of 75497497 is about 422.6467345098.

The spelling of 75497497 in words is "seventy-five million, four hundred ninety-seven thousand, four hundred ninety-seven".