73779889 has 2 divisors, whose sum is σ = 73779890. Its totient is φ = 73779888.

The previous prime is 73779877. The next prime is 73779941. The reversal of 73779889 is 98897737.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 33837489 = 6320^2 + 5817^2 .

It is a cyclic number.

It is not a de Polignac number, because 73779889 - 2¹³ = 73771697 is a prime.

It is not a weakly prime, because it can be changed into another prime (73779809) 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, 36889944 + 36889945.

It is an arithmetic number, because the mean of its divisors is an integer number (36889945).

Almost surely, 2^73779889 is an apocalyptic number.

It is an amenable number.

73779889 is a deficient number, since it is larger than the sum of its proper divisors (1).

73779889 is an equidigital number, since it uses as much as digits as its factorization.

73779889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 58.

The square root of 73779889 is about 8589.5220472387. The cubic root of 73779889 is about 419.4169707011.

The spelling of 73779889 in words is "seventy-three million, seven hundred seventy-nine thousand, eight hundred eighty-nine".