73949789 has 2 divisors, whose sum is σ = 73949790. Its totient is φ = 73949788.

The previous prime is 73949749. The next prime is 73949801. The reversal of 73949789 is 98794937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 34987225 = 6242^2 + 5915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73949789 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73949749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36974894 + 36974895.

It is an arithmetic number, because the mean of its divisors is an integer number (36974895).

Almost surely, 2^73949789 is an apocalyptic number.

It is an amenable number.

73949789 is a deficient number, since it is larger than the sum of its proper divisors (1).

73949789 is an equidigital number, since it uses as much as digits as its factorization.

73949789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 56.

The square root of 73949789 is about 8599.4063167175. The cubic root of 73949789 is about 419.7386677376.

The spelling of 73949789 in words is "seventy-three million, nine hundred forty-nine thousand, seven hundred eighty-nine".