75378733 has 2 divisors, whose sum is σ = 75378734. Its totient is φ = 75378732.

The previous prime is 75378713. The next prime is 75378749. The reversal of 75378733 is 33787357.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74269924 + 1108809 = 8618^2 + 1053^2 .

It is an emirp because it is prime and its reverse (33787357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75378733 - 2²¹ = 73281581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75378733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75378713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37689366 + 37689367.

It is an arithmetic number, because the mean of its divisors is an integer number (37689367).

Almost surely, 2^75378733 is an apocalyptic number.

It is an amenable number.

75378733 is a deficient number, since it is larger than the sum of its proper divisors (1).

75378733 is an equidigital number, since it uses as much as digits as its factorization.

75378733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 43.

The square root of 75378733 is about 8682.0926624864. The cubic root of 75378733 is about 422.4249984159.

The spelling of 75378733 in words is "seventy-five million, three hundred seventy-eight thousand, seven hundred thirty-three".