73942789 has 2 divisors, whose sum is σ = 73942790. Its totient is φ = 73942788.

The previous prime is 73942777. The next prime is 73942823. The reversal of 73942789 is 98724937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73530625 + 412164 = 8575^2 + 642^2 .

It is an emirp because it is prime and its reverse (98724937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73942789 - 2¹⁵ = 73910021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73942189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36971394 + 36971395.

It is an arithmetic number, because the mean of its divisors is an integer number (36971395).

Almost surely, 2^73942789 is an apocalyptic number.

It is an amenable number.

73942789 is a deficient number, since it is larger than the sum of its proper divisors (1).

73942789 is an equidigital number, since it uses as much as digits as its factorization.

73942789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 73942789 is about 8598.9993022444. Note that the first 3 decimals coincide. The cubic root of 73942789 is about 419.7254233302.

The spelling of 73942789 in words is "seventy-three million, nine hundred forty-two thousand, seven hundred eighty-nine".