75220993 has 2 divisors, whose sum is σ = 75220994. Its totient is φ = 75220992.

The previous prime is 75220987. The next prime is 75220997. The reversal of 75220993 is 39902257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75220929 + 64 = 8673^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 75220993 - 2⁵ = 75220961 is a prime.

It is not a weakly prime, because it can be changed into another prime (75220997) 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, 37610496 + 37610497.

It is an arithmetic number, because the mean of its divisors is an integer number (37610497).

Almost surely, 2^75220993 is an apocalyptic number.

It is an amenable number.

75220993 is a deficient number, since it is larger than the sum of its proper divisors (1).

75220993 is an equidigital number, since it uses as much as digits as its factorization.

75220993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 75220993 is about 8673.0036896107. The cubic root of 75220993 is about 422.1301325194.

The spelling of 75220993 in words is "seventy-five million, two hundred twenty thousand, nine hundred ninety-three".