73388993 has 2 divisors, whose sum is σ = 73388994. Its totient is φ = 73388992.

The previous prime is 73388981. The next prime is 73389031. The reversal of 73388993 is 39988337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37112464 + 36276529 = 6092^2 + 6023^2 .

It is an emirp because it is prime and its reverse (39988337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73388993 - 2¹⁴ = 73372609 is a prime.

It is not a weakly prime, because it can be changed into another prime (73388933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36694496 + 36694497.

It is an arithmetic number, because the mean of its divisors is an integer number (36694497).

Almost surely, 2^73388993 is an apocalyptic number.

It is an amenable number.

73388993 is a deficient number, since it is larger than the sum of its proper divisors (1).

73388993 is an equidigital number, since it uses as much as digits as its factorization.

73388993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 73388993 is about 8566.7375937401. The cubic root of 73388993 is about 418.6749491101.

The spelling of 73388993 in words is "seventy-three million, three hundred eighty-eight thousand, nine hundred ninety-three".