75978403 has 2 divisors, whose sum is σ = 75978404. Its totient is φ = 75978402.

The previous prime is 75978323. The next prime is 75978431. The reversal of 75978403 is 30487957.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75978403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75978403.

It is not a weakly prime, because it can be changed into another prime (75978443) 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, 37989201 + 37989202.

It is an arithmetic number, because the mean of its divisors is an integer number (37989202).

Almost surely, 2^75978403 is an apocalyptic number.

75978403 is a deficient number, since it is larger than the sum of its proper divisors (1).

75978403 is an equidigital number, since it uses as much as digits as its factorization.

75978403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 75978403 is about 8716.5591261690. The cubic root of 75978403 is about 423.5422313427.

The spelling of 75978403 in words is "seventy-five million, nine hundred seventy-eight thousand, four hundred three".