75145537 has 2 divisors, whose sum is σ = 75145538. Its totient is φ = 75145536.

The previous prime is 75145501. The next prime is 75145541. The reversal of 75145537 is 73554157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 10246401 = 8056^2 + 3201^2 .

It is an emirp because it is prime and its reverse (73554157) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75145537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75145496 and 75145505.

It is not a weakly prime, because it can be changed into another prime (75145547) 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, 37572768 + 37572769.

It is an arithmetic number, because the mean of its divisors is an integer number (37572769).

Almost surely, 2^75145537 is an apocalyptic number.

It is an amenable number.

75145537 is a deficient number, since it is larger than the sum of its proper divisors (1).

75145537 is an equidigital number, since it uses as much as digits as its factorization.

75145537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73500, while the sum is 37.

The square root of 75145537 is about 8668.6525481184. The cubic root of 75145537 is about 421.9889356428.

The spelling of 75145537 in words is "seventy-five million, one hundred forty-five thousand, five hundred thirty-seven".